四级英语阅读专项练习带答案
大学英语四级仔细阅读专项练习20篇(附答案)
大学英语四级仔细阅读专项练习20篇（附答案）练习一（2010年12月大学英语四级考试真题）Passage OneQuestions 57 to 61 are based on the following passage.It is pretty much a one-way street. While it may be common for university researchers to try their luck in the commercial world, there is very little traffic in the opposite direction. Pay has always been the biggest deterrent, as people with families often feel they cannot afford the drop in salary when moving to a university job. For some industrial scientists, however, the attractions of academia (学术界) outweigh any financial considerations.Helen Lee took a 70% cut in salary when she moved from a senior post in Abbott Laboratories to a medical department at the University of Cambridge. Her main reason for returning to academia mid-career was to take advantage of the greater freedom to choose research questions. Some areas of inquiry have few prospects of a commercial return, and Lee's is one of them.The impact of a salary cut is probably less severe for a scientist in the early stages of a career. Guy Grant, now a research associate at the Unilever Centre for Molecular Informatics at the University of Cambridge, spent two years working for a pharmaceutical (制药的) company before returning to university as a post-doctoral researcher. He took a 30% salary cut but felt it worthwhile for the greater intellectual opportunities.Higher up the ladder, where a pay cut is usually more significant, the demand for scientists with a wealth of experience in industry is forcing universities to make the transition (转换) to academia more attractive, according to Lee. Industrial scientists tend to receive training that academics do not, such as how to build a multidisciplinary team, manage budgets and negotiate contracts. They are also well placed to bring something extra to the teaching side of an academic role that will help students get a job when they graduate, says Lee, perhaps experience in manufacturing practice or product development. “Only a small number of undergraduates willcontinue in an academic career. So someone leaving university who already has the skills needed to work in an industrial lab has far more potential in the job market than someone who has spent all their time on a narrow research project.”57. By “a one-way street” (Line 1, Para. 1), the author means ________.[A] university researchers know little about the commercial world[B] there is little exchange between industry and academia[C] few industrial scientists would quit to work in a university[D] few university professors are willing to do industrial research58. The word “deterrent” (Line 2, Para. 1) most probably refers to something that ________.[A] keeps someone from taking action [C] attracts people's attention[B] helps to move the traffic [D] brings someone a financial burden59. What was Helen Lee's major consideration when she changed her job in the middle of her career?[A] Flexible work hours. [C] Her preference for the lifestyle on campus.[B] Her research interests. [D] Prospects of academic accomplishments.60. Guy Grant chose to work as a researcher at Cambridge in order to ________.[A] do financially more rewarding work[B] raise his status in the academic world[C] enrich his experience in medical research[D] exploit better intellectual opportunities61. What contribution can industrial scientists make when they come to teach in a university?[A] Increase its graduates' competitiveness in the job market.[B] Develop its students' potential in research.[C] Help it to obtain financial support from industry.[D] Gear its research towards practical applications.Passage TwoQuestions 62 to 66 are based on the following passage.Being sociable looks like a good way to add years to your life. Relationships with family, friends, neighbours, even pets, will all do the trick, but the biggest longevity (长寿) boost seems to come from marriage or an equivalent relationship. The effect was first noted in 1858 by William Farr, who wrote that widows and widowers (鳏夫) were at a much higher risk of dying than their married peers. Studies since then suggest that marriage could add as much as seven years to a man's life and two to a woman's. The effect holds for all causes of death, whether illness, accident or self-harm.Even if the odds are stacked against you, marriage can more than compensate. Linda Waite of the University of Chicago has found that a married older man with heart disease can expect to live nearly four years longer than an unmarried man with a healthy heart. Likewise, a married man who smokes more than a pack a day is likely to live as long as a divorced man who doesn't smoke. There's a flip side, however, as partners are more likely to become ill or die in the couple of years following their spouse's death, and caring for a spouse with mental disorder can leave you with some of the same severe problems. Even so, the odds favour marriage. In a 30-year study of more than 10,000 people, Nicholas Christakis of Harvard Medical School describes how all kinds of social networks have similar effects.So how does it work? The effects are complex, affected by socio-economic factors, health-service provision, emotional support and other more physiological (生理的) mechanisms. For example, social contact can boost development of the brain and immune system, leading to better health and less chance of depression later in life. People in supportive relationships may handle stress better. Then there are the psychological benefits of a supportive partner.A life partner, children and good friends are all recommended if you aim to live to 100. The ultimate social network is still being mapped out, but Christakis says: “People are interconnected, so their health is interconnected.”62. William Farr's study and other studies show that _________.[A] social life provides an effective cure for illness[B] being sociable helps improve one's quality of life[C] women benefit more than men from marriage[D] marriage contributes a great deal to longevity63. Linda Waite's studies support the idea that _________.[A] older men should quit smoking to stay healthy[B] marriage can help make up for ill health[C] the married are happier than the unmarried[D] unmarried people are likely to suffer in later life64. It can be inferred from the context that the “flip side” (Line 4, Para. 2) refers to _________.[A] the disadvantages of being married[B] the emotional problems arising from marriage[C] the responsibility of taking care of one's family[D] the consequence of a broken marriage65. What does the author say about social networks?[A] They have effects similar to those of a marriage.[B] They help develop people's community spirit.[C] They provide timely support for those in need.[D] They help relieve people of their life's burdens.66. What can be inferred from the last paragraph?[A] It's important that we develop a social network when young.[B] To stay healthy, one should have a proper social network.[C] Getting a divorce means risking a reduced life span.[D] We should share our social networks with each other.练习二（2010年6月英语四级考试真题）Passage OneQuestions 57 to 61 are based on the following passage.You never see him, but they're with you every time you fly. They record where you are going, how fast you're traveling and whether everything on your airplane is functioning normally. Their ability to withstand almost any disaster makes them seem like something out of a comic book. They're known as the black box.When planes fall from the sky, as a Yemeni airliner did on its way to Comoros Islands in the India Ocean, June 30, 2009, the black box is the best bet for identifying what went wrong. So when a French submarine (潜水艇) detected the device's homing signal five days later, the discovery marked a huge step toward determining the cause of a tragedy in which 152 passengers were killed.In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction. That was the first mode for a black box, which became a requirement on all U.S. commercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965 the device was completely redesigned and moved to the rear of the plane – the area least subject to impact – from its original position in the landing wells (起落架舱). The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations, and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments. Placed in an insulated (隔绝的) case and surrounded by a quarter-inch-thick panels of stainless steel, the boxes can withstand massive force and temperatures up to 2,000℉. When submerged, they're also able to emit signals from depths of 20,000 ft. Experts believe the boxes from Air France Flight 447, which crashed near Brazil on June 1,2009, are in water nearly that deep, but statistics say they're still likely to turn up. In the approximately 20 deep-sea crashes over the past 30 years, only one plane's black boxes were never recovered.57. What does the author say about the black box?A) It ensures the normal functioning of an airplane.B) The idea for its design comes from a comic book.C) Its ability to ward off disasters is incredible.D) It is an indispensable device on an airplane.58. What information could be found from the black box on the Yemeni airliner?A) Data for analyzing the cause of the crash.B) The total number of passengers on board.C) The scene of the crash and extent of the damage.D) Homing signals sent by the pilot before the crash.59. Why was the black box redesigned in 1965?A) New materials became available by that time.B) Too much space was needed for its installation.C) The early models often got damaged in the crash.D) The early models didn't provide the needed data.60. Why did the Federal Aviation Authority require the black boxes be painted orange or yellow?A) To distinguish them from the colour of the plane.B) To caution people to handle them with care.C) To make them easily identifiable.D) To conform to international standards.61. What do we know about the black boxes from Air France Flight 447?A) There is still a good chance of their being recovered.B) There is an urgent need for them to be reconstructed.C) They have stopped sending homing signals.D) They were destroyed somewhere near Brazil.Passage TwoQuestions 62 to 66 are based on the following passage.The $11 billion self-help industry is built on the idea that you should turn negative thoughts like “I never do anything right” into positive ones like “I can succeed.” Butwas positive thinking advocate Norman Vincent Peale right? Is there power in positive thinking?Researchers in Canada just published a study in the journal Psychological Science that says trying to get people to think more positively can actually have the opposite effect: it can simply highlight how unhappy they are.The study's authors, Joanne Wood and John Lee of the University of Waterloo and Elaine Perunovic of the University of New Brunswick, begin by citing older research showing that when people get feedback which they believe is overly positive, they actually feel worse, not better. If you tell your dim friend that he has the potential of an Einstein, you're just underlining his faults. In one 1990s experiment, a team including psychologist Joel Cooper of Princeton asked participants to write essays opposing funding for the disabled. When the essayists were later praised for their sympathy, they felt even worse about what they had written.In this experiment, Wood, Lee and Perunovic measured 68 students' self-esteem. The participants were then asked to write down their thoughts and feelings for four minutes. Every 15 seconds, one group of students heard a bell. When it rang, they were supposed to tell themselves, “I am lovable.”Those with low self-esteem didn't feel better after the forced self-affirmation. In fact, their moods turned significantly darker than those of members of the control group, who weren't urged to think positive thoughts.The paper provides support for newer forms of psychotherapy (心理治疗) that urge people to accept their negative thoughts and feelings rather than fight them. In the fighting, we not only often fail but can make things worse. Meditation (静思) techniques, in contrast, can teach people to put their shortcomings into a larger, more realistic perspective. Call it the power of negative thinking.62. What do we learn from the first paragraph about the self-help industry?A) It is a highly profitable industry.B) It is based on the concept of positive thinking.C) It was established by Norman Vincent Peale.D) It has yielded positive results.63. What is the finding of the Canadian researchers?A) Encouraging positive thinking many do more harm than good.B) There can be no simple therapy for psychological problems.C) Unhappy people cannot think positively.D) The power of positive thinking is limited.64. What does the author mean by “… you're just underlining his faults” (Line 4, Para.3)?A) You are not taking his mistakes seriously enough.B) You are pointing out the errors he has committed.C) You are emphasizing the fact that he is not intelligent.D) You are trying to make him feel better about his faults.65. What do we learn from the experiment of Wood, Lee and Perunovic?A) It is important for people to continually boost their self-esteem.B) Self-affirmation can bring a positive change to one's mood.C) Forcing a person to think positive thoughts may lower their self-esteem.D) People with low self-esteem seldom write down their true feelings.66. What do we learn from the last paragraph?A) The effects of positive thinking vary from person to person.B) Meditation may prove to be a good form of psychotherapy.C) Different people tend to have different ways of thinking.D) People can avoid making mistakes through meditation.练习三（2013年6月大学英语四级考试真题）Passage OneQuestions 57 to 61 are based on the following passage.Junk food is everywhere. We're eating too much of it. Most of us know what we're doing and yet we do it anyway.So here's a suggestion offered by two researchers at the Rand Corporation: Why not take a lesson from alcohol control policies and apply them to where food is soldand how it's displayed?“Many policy measures to control obesity（肥胖症）assume that people consciously and rationally choose what and how much they eat and therefore focus on providing information and more access to healthier foods,” note the two researchers.“In contrast,” the researchers continue, “many regulations that don't assume people make rational choices have been successfully applied to control alcohol, a substance — like food — of which immoderate consumption leads to serious health problems.”The research references studies of people's behavior with food and alcohol and results of alcohol restrictions, and then lists five regulations that the researchers think might be promising if applied to junk foods. Among them:Density restrictions: licenses to sell alcohol aren't handed out unplanned to all comers but are allotted（分配）based on the number of places in an area that already sell alcohol. These make alcohol less easy to get and reduce the number of psychological cues to drink.Similarly, the researchers say, being presented with junk food stimulates our desire to eat it. So why not limit the density of food outlets, particularly ones that sell food rich in empty calories? And why not limit sale of food in places that aren't primarily food stores?Display and sales restrictions: California has a rule prohibiting alcohol displays near the cash registers in gas stations, and in most places you can't buy alcohol at drive-through facilities. At supermarkets, food companies pay to have their wares in places where they're easily seen. One could remove junk food to the back of the store and ban them from the shelves at checkout lines. The other measures include restricting portion sizes, taxing and prohibiting special price deals for junk foods, and placing warning labels on the products.57. What does the author say about junk food?A) People should be educated not to eat too much.B) It is widely consumed despite its ill reputation.C) Its temptation is too strong for people to resist.D) It causes more harm than is generally realized.58. What do the Rand researchers think of many of the policy measures to control obesity?A) They should be implemented effectively.B) They provide misleading information.C) They are based on wrong assumptions.D) They help people make rational choices.59. Why do policymakers of alcohol control place density restrictions?A) Few people are able to resist alcohol's temptations.B) There are already too many stores selling alcohol.C) Drinking strong alcohol can cause social problems.D) Easy access leads to customers' over-consumption.60. What is the purpose of California's rule about alcohol display in gas stations?A) To effectively limit the density of alcohol outlets.B) To help drivers to give up the habit of drinking.C) To prevent possible traffic jams in nearby areas.D) To get alcohol out of drivers' immediate sight.61. What is the general guideline the Rand researchers suggest about junk food control?A) Guiding people to make rational choices about food.B) Enhancing people's awareness of their own health.C) Borrowing ideas from alcohol control measures.D) Resorting to economic, legal and psychological means.Passage TwoQuestions 62 to 66 are based on the following passage.Kodak's decision to file for bankruptcy（破产）protection is a sad, though not unexpected, turning point for a leading American corporation that pioneered consumer photography and dominated the film market for decades, but ultimatelyfailed to adapt to the digital revolution.Although many attribute Kodak's downfall to “complacency(自满)”, that explanation doesn't acknowledge the lengths to which the company went to reinvent itself. Decades ago, Kodak anticipated that digital photography would overtake film — and in fact, Kodak invented the first digital camera in 1975 — but in a fateful decision, the company chose to shelf its new discovery to focus on its traditional film business.It wasn't that Kodak was blind to the future, said Rebecca Henderson, a professor at Harvard Business School, but rather that it failed to execute on a strategy to confront it. By the time the company realized its mistake, it was too late.Kodak is an example of a firm that was very much aware that they had to adapt, and spent a lot of money trying to do so, but ultimately failed. Large companies have a difficult time switching into new markets because there is a temptation to put existing assets into the new businesses.Although Kodak anticipated the inevitable rise of digital photography, its corporate（企业的）culture was too rooted in the successes of the past for it to make the clean break necessary to fully embrace the future. They were a company stuck in time. Their history was so important to them. Now their history has become a liability.Kodak's downfall over the last several decades was dramatic. In 1976, the company commanded 90% of the market for photographic film and 85% of the market for cameras. But the 1980s brought new competition from Japanese film company Fuji Photo, which undermined Kodak by offering lower prices for film and photo supplies. Kodak's decision not to pursue the role of official film for the 1984 Los Angeles Olympics was a major miscalculation. The bid went instead to Fuji, which exploited its sponsorship to win a permanent foothold in the marketplace.62. What do we learn about Kodak?A) It went bankrupt all of a sudden.B) It is approaching its downfall.C) It initiated the digital revolution in the film industry.D) It is playing a dominant role in the film market.63. Why does the author mention Kodak's invention of the first digital camera?A) To show its early attempt to reinvent itself.B) To show its effort to overcome complacency.C) To show its quick adaptation to the digital revolution.D) To show its will to compete with Japan's Fuji photo.64. Why do large companies have difficulty switching to new markets?A) They find it costly to give up their existing assets.B) They tend to be slow in confronting new challenges.C) They are unwilling to invest in new technology.D) They are deeply stuck in their glorious past.65. What does the author say Kodak's history has become?A) A burden.B) A mirror.C) A joke.D) A challenge.66. What was Kodak's fatal mistake?A) Its blind faith in traditional photography.B) Its failure to see Fuji photo's emergence.C) Its refusal to sponsor the 1984 Olympics.D) Its overconfidence in its corporate culture.练习四（2014年6月英语四级考试真题）Passage OneQuestions 56 to 60are based on the following passage.The question of whether our government should promote science and technology or the liberal arts in higher education isn't an either/or proposition(命题)，although the current emphasis on preparing young Americans for STEM (science, technology, engineering, maths)----related fields can make it seem that way.The latest congressional report acknowledges the critical importance of technicaltraining, but also asserts that the study of the humanities (人文学科)and social sciences must remain central components of America's educational system at all levels. Both are critical to producing citizens who can participate effectively in our democratic society, become innovative (创新的) leaders, and benefit from the spiritual enrichment that the reflection on the great ideas of mankind over time provides.Parents and students who have invested heavily in higher education worry about graduates' job prospects as technological advances and changes in domestic and global markets transform professions in ways that reduce wages and cut jobs. Under these circumstances, it's natural to look for what may appear to be the most “practical” way out of the problem “Major in a subject designed to get you a job” seems the obvious answer to some, though this ignores the fact that many disciplines in the humanities characterized as “soft” often, in fact, lead to employment and success in the long run. Indeed, according to surveys, employers have expressed a preference for students who have received a broadly-based education that has taught them to write well, think critically, research creatively, and communicate easily.Moreover, students should be prepared not just for their first job, but for their 4th and 5th jobs, as there's little reason to doubt that people entering the workforce today will be called upon to play many different roles over the course of their careers. The ones who will do the best in this new environment will be those whose educations have prepared them to be flexible. The ability to draw upon every available tool and insight----picked up from science, arts, and technology—to solve the problems of the future, and take advantage of the opportunities that present themselves, will be helpful to them and the United States.56. What does the latest congressional report suggest?A) STEM-related subjects help students find jobs in the information society.B) The humanities and STEM subjects should be given equal importance.C) The liberal arts in higher education help enrich students' spiritual life.D) Higher education should be adjusted to the practical needs of society.57. What is the main concern of students when they choose a major?A) Their interest in relevant subjects.B) The academic value of the courses.C) The quality of education to receive.D) Their chances of getting a good job.58. What does the author say about the so called soft subjects?A) They benefit students in their future life.B) They broaden students' range of interests.C) They improve students' communication skills.D) They are essential to students' healthy growth.59. What kind of job applicants do employers look for?A) Those who have a strong sense of responsibility.B) Those who are good at solving practical problems.C) Those who are likely to become innovative leaders.D) Those who have received a well-rounded education.60. What advice does the author give to college students?A) Seize opportunities to tap their potential.B) Try to take a variety of practical courses.C) Prepare themselves for different job options.D) Adopt a flexible approach to solving problems.Passage TwoQuestions 61 to 65 are based on the following passage.Energy independence. It has a nice ring to it. Doesn't it? If you think so, you're not alone, because energy independence has been the dream of American president for decades, and never more so than in the past few years, when the most recent oil price shock has been partly responsible for kicking off the great recession.“Energy independence” and its rhetorical (修辞的) companion “energy security” are, however, slippery concepts that are rarely though through. What is it we want independence from, exactly?Most people would probably say that they want to be independent from imported oil. But there are reasons that we buy all that old from elsewhere.The first reason is that we need it to keep our economy running. Yes, there is a trickle（涓涓细流）of biofuel（生物燃料）available, and more may become available, but most biofuels cause economic waste and environmental destruction.Second, Americans have basically decided that they don't really want to produce all their own oil. They value the environmental quality they preserve over their oil imports from abroad. Vast areas of the United States are off-limits to oil exploration and production in the name of environmental protection. To what extent are Americans really willing to endure the environmental impacts of domestic energy production in order to cut back imports?Third, there are benefits to trade. It allows for economic efficiency, and when we buy things from places that have lower production costs than we do, we benefit. And although you don't read about this much, the United States is also a large exporter of oil products, selling about 2 million barrels of petroleum products per day to about 90 countries.There is no question that the United States imports a great deal of energy and, in fact, relies on that steady flow to maintain its economy. When that flow is interrupted, we feel the pain in short supplies and higher prices, At the same time, we derive massive economic benefits when we buy the most affordable energy on the world market and when we engage in energy trade around the world.61. What does the author say about energy independence for America?A) It sounds very attractive.B) It ensures national security.C) It will bring oil prices downD) It has long been everyone's dream.62. What does the author think of biofuels?A) They keep America's economy running healthily.B) They prove to be a good alternative to petroleum.。
英语四级阅读理解精选练习及答案
英语四级阅读理解精选练习及答案英语四级阅读理解练习一：Personality is , to large extent, inherent --A-type parents usually bring about A-type offspring. But the environment must also have a profound effect, since if competition is improtant to the parents, it is likely to become a major factor lives of their children.One place where children soak up A characteristics is school, which is, by its very nature, a highly competitive institution. Too many schools adopt the "win at all costs" moral standard and measure their success by sporting achievements. The current passion for making children compete against their classmates or against the clock produces a two-layer system, in which competitive A types seem in some way better than their B-type fellows. Being too keen to win can have dangerous consequences:remember that Pheidippides ,the first marathon runner, dropped dead seconds after saying:"Rejoice, we conquer!".By far the worst form of competition in school is the disproportionate emphasis on examinations . It is a rare school that allows pupils to concentrate on those things they do well.The merits of competition by examination are somewhat questionable, but competition in the certain knowledge of failure is positively harmful.Obviously, it is neither practical nor desirable that all A youngsters change into Bs. The would needs types, and schools have an important dutyto try to fit a childs personality to his possible future employment. It is top management.1. According to the author, what factors contribute to the building of personality?A. inheritanceb. inheritance, competition and environmentc. competitiond. environment2.Which of the following statements is not true according to the author of the passage?A. Schools usually adopt severe competitive policies.B. Students are often divided by competition results.C. School is place where children cultivate their characteristics.D. The stronger desire for winning, the better.3.The phrase "soak up" is closest in meaning to ____.A. pull up b. take up c. take in d. pull in4.What attitude does the author hold toward examinations in schools?A. positive b. negative c. doubtful d. neutral5.what suggestion does the author make concerning the management of schools?A. All students be made into competitive A types.B. A childs personality be considered in regard to his possible future job.C. All students be changed into B characteristics.D. Schools abolish all forms of examinations.答案：bdccb英语四级阅读理解练习二：Nearly everybody buys a used car sooner or later, as a primary vehicle (首要的交通工具) or as a second car. Indeed(当然), three out of four sales today are used cars, and theyre not cheap junkers (废物)either—the average price now is $ 5500, about half what a new car costs. Make the wrong selection and a major investment (投资)can be lost the moment you drive off the lot.There is far less chance of this happening to you if you know: when to buy, where to buy, how to examine (仔细检查) the car, how to conduct (进行) your own road test, and how to bargain over (讲价)the price.When to buyShop during the day. Lighting makes cars gleam (V 闪光)like jewels (宝石)at night. In daylight they look dull (黯淡的), but realistic.Dont shop in the rain. It can mask(掩盖) liquids (液体) that might be leaking (泄漏). If possible, shop in the winter when supplies are high and demand (需求)is low.Where to buyShop the suburbs. In more affluent (富有的)neighborhoods cars are more likely to have been well cared for.A private owner normally sells a car for less than a dealer(商人) does, but almost always "as is," with no guarantee(质量保证). Thats an acceptable risk if what youre looking for is a cheap second car to "drive to the station. "Even though a used-car dealer generally charges more, you can often get some type of limited guarantee. This is often a 50-50 plan, in which you each pay half on repairs for a period (一段时间)that may range from 30 days to a year. Ask the dealer about the availability of an optional(可选择的) service policy.Used-car dealers often claim (声称)to have gone over (仔细查看)the car, and many have. But remember that small dealers often buy cars that are auctioned (拍卖 ) because nobody else wants them.Some experts feel that a new-car dealer is the best place to buy a secondhand car, especially if youre laying out a large sum (一笔金钱) for a late model. Some of these dealers offer extensive (广阔的)guarantees, such as one on the "drive train," which covers any problems with engine (发动机), transmission(变速器) ， drive shaft and differential (差速器 ). Expect to pay for this, as well as for the markup (标高的价格). But if you shop soon after the new models have arrived, when a dealer has a lot of trade-ins tying up his profits, he might deal. The visual examination (视觉上的检查)Youve found your dream car, and can hardly wait to get in and roar away. Wait.First, look for any flaws (瑕疵)or ripples(划痕) in the body that might indicate a past accident (暗示曾经出过事故). To see if a car has been repainted(重新漆过), look under the rubber seals around the door or under the chrome trim. Repainting may mask deep flaws (重新上漆可能隐藏深层的瑕疵).Check the odometer (计程器) for total mileage (英里数), and then compare that figure (数字)with any stickers still attached to door posts. Its illegal to change odometer readings, but it happens. If there are no stickers, be a little suspicious. Check pedals and controls: wear on these parts should agree with the mileage. If they are brand new, be suspicious. If they are worn out, beware.Check that the doors, hood and trunk all open smoothly and close with solid sound. Sight along the sides of the car from 30 feet away to be sure that the rear and front wheels line up.Look under the car for fluid leaks. Except for condensation from a working air conditioner on a hot day, no car should ever drip anything, any time.Now sit in the drivers seat and try the controls. The car should fit you—it should be comfortable. Check seat adjustment, door locks, window-raising mechanisms, horn, lights, directional signals, radio—all accessories.Start the engine. It should turn over quickly and then settle down to a rather fast idle. Give the engine a moment or two before you press the accelerator a bit. Watch for smoke from the rear. Blue smoke mightmean a complete engine overhaul (大修) , black a maladjusted carburetor (化油器). 2White smoke can be. Ignored if the engine is cold, but once it is warmed up, white smoke can mean a leaking head gasket (垫圈) : expensive. Reject this car.After the engine has warmed, shut it off, and then go wipe your finger inside the tailpipe (making sure its not too hot). The residue should be whitish-gay. If you get a black, oily mark, refuse the car—its probably an oil burner.Restart the engine and check the oil in an automatic transmission. It should be clean and clear, with no burned odor. The test drive The salesman may try to convince you that a short drive around the block is enough. Wrong. Make it clear that you plan to road test the car, and if he isnt happy with this look elsewhere.The test route you have mapped out should include dry city streets, a freeway, a hill, a bumpy road and an empty parking lot. All gauges(计量器) should read steady and normal throughout the test, especially oil pressure and engine heat. If not, dont buy the car.Drive to a traffic-free city street on your predetermined route and then accelerate smoothly to about 35 miles per hour. The automatic transmission should shift without jerking and with no noise.Slow to about 7 m. p. h. by gently applying the brakes. There should be no noise, no sharp sound or grinding. The car should slow in a straight line, with no pulling to the right or left.Pick up speed to about 15; then making certain nobody is behind you, hit the brakes hard! The car should come to an immediate stop without making noise or swerving.In an empty, level parking lot, brake to a complete stop. Shift into reverse and back up at about 4 m. p. h. , brake to a halt, shift into forward, etc. Do this four or five times to test the transmission. All shifting should be smooth, with no noise or hesitation.Accelerate up a hill to about 40 m. p. h. The car should not labor. If it does, you could have a rotten transmission. Go back down the hill. Stop halfway, shift into neutral and set the parking brake. The car should remain stationary when you take your foot off the brake pedal.Drive the car over the bumpy road, up a hill, and on the highway. Rarely will a car be perfect. However by now you should have a pretty good idea what needs to be done. How to bargainUse what youve learned from the visual exam, test drive and outside mechanic to get the price down. Have a maximum figure in mind, based on your inspection and on current prices from a used-car guide. Start your bidding lower than that. When you have nearly arrived at a price, get the seller to throw in certain repairs. It may be cheaper for him than further price cuts.1. Following the instructions here will help you make a good selection when buying a used car.2. Winter is a good time for purchasing a car because there is little rain in winter.3. You are more likely to pay less to a private owner for a car of poor quality.4. Refuse the car if you find any signs of a past accident in the visual examination.5. Dont buy the car if there is white smoke coming out of the rear because it is probably an oil burner.6. At certain speeds in the tests, a good car should not make any noise when the driver brakes either hard or gently.7. If you are patient and careful enough, you will certainly find a perfect used car.8. The last step before you make a decision to buy a car is______.9. Besides all gauges, the two very important systems mainly examined in the test drive are______.10. According to some experts, the best place to buy a second-hand car is______.答案：1. Y 2. N 3. Y 4. NG 5. N 6. Y 7. N 8. to bargain over the price 9. brake and transmission 10. a new-car dealer。
大学英语四级阅读理解试题12篇(含答案)
大学英语四级阅读理解试题12篇（含答案）Long-range goals may be related to our dreams of the future. They might cover five years or more. Life is not a static thing. We should never allow a long-term goal to limit us or our course of action.1.Our long-term goals mean a lot.B.if we cannot reach solid short-term goalsC.if we write down the datesD.if we put forward some plans2. New short-term goals are bulid upon.A.two yearsB.long-term goalsA.we will win final successB.we are overwhelmedC.we should build up confidence of successD.we should strong desire for setting new goals4. Once our goals are drawn up,.B. we may change our goals as we have new ideas and opportunitiesC.we had better wait for the exciting news of successD. we have made great decision5. It is implied but not stated in the passage thatA.those who habe long-term goals will succeedB.writing down the dates may discourage youC.the goal is only a guide for us to reach our desinationD.every should have a goal答案：adcbc。
四级英语考试阅读精选题及答案解析
四级英语考试阅读精选题及答案解析四级英语考试阅读精选题(一)There are people in Italy who can’t stand soccer. Not all Canadians love hockey. A similar situation e某ists in America, where there are those individuals you may be one of them who yawn or even frown when somebody mentions baseball. 『Baseball to them means boring hours watching grown men in funny tight outfits standing around in a field staring away while very little of anything happens.』① They tell you it’s a game better suited to the 19th century, slow, quiet, gentlemanly. These are the same people you may be one of them who love football because there’s the sport that glorifies “the hit〞.By contrast, baseball seems abstract, cool, silent, still.On TV the game is fractured into a dozen perspectives, replays, close瞮ps. The geometry of the game, however, is essential to understanding it. You will contemplate the game from one point as a painter does his subject; you may, of course, project yourself into the game. It is in this projection that the game affords so much space and time for involve ment. The TV won’t do it for you.Take, for e某ample, the third baseman. You sit behind the third base dugout and you watch him watching home plate. His legs are apart, knees fle某ed. His arms hang loose. He does a lot of this. The skeptic still cannot think of any other sports so still, so passive. 『But watch what happens every time the pitcher throws: the third baseman goes up on his toes, fle某es his arms or bring the glove to a point in front of him, takes a step right or left, backward or forward, perhaps he glances across the field to check his first baseman’s position.』② Suppose the pitch is a ball. “Nothinghappened,〞you say. “I could have had my eyes closed.〞The skeptic and the innocent must play the game. And this involvement in the stands is no more intellectual than listening to music is. Watch the third baseman. Smooth the dirt in front of you with one foot; smooth the pocket in your glove; watch the eyes of the batter, the speed of the bat, the sound of horsehide on wood. If football is a symphony of movement and theatre, baseball is chamber music, a spacious interlocking of notes, chores and responses.1. The passage is mainly concerned with .A. the different tastes of people for sportsB. the different characteristics of sportsC. the attraction of footballD. the attraction of baseball2. Those who don’t like baseball may complain that .A. it is only to the taste of the oldB. it involves fewer players than footballC. it is not e某citing enoughD. it is pretentious and looks funnyThe author admits that .A. baseball is too peaceful for the youngB. baseball may seem boring when watched on TVC. football is more attracting than baseballD. baseball is more interesting than football4. By stating “I could have had my eyes closed. 〞 the author means (4th paragraph last sentence): A. The third baseman would rather sleep than play the game.B. Even if the third baseman closed his eyes a moment ago, it could make no different to the result.C. The third baseman is sogood at baseball that he could finish the game with eyes closed all the time and do his work well.D. The consequent was too bad he could not bear to see it.5. We can safely conclude that the author.A. likes footballB. hates footballC. hates baseballD. likes baseball四级英语考试阅读精选题答案1. D主旨题。
大学四级英语仔细阅读专项习题附答案
大学四级英语仔细阅读专项习题(一)Of the thousands of different kinds of animals that exist in the world man has learned to make friends with an enormous number. Some are pets, and offer him companionship; some give protection, and some do hard work which man cannot do for himself. Dogs, which serve man in all three capacities, are found in various breeds in all countries of the world. The Husky can live in the cold polar regions, and the Saluki is at home in the hottest parts of Central Africa. The inhabitants of certain countries are dependent for their very lives on the camel. In the West Indies the little donkey, strong and sure-footed, carrying heavy loads even in mountainous places, is a familiar sight.来源：考试大Trained and tamed for many generations, domestic animals are not accustomed to roaming(到处走动) in search of food and shelter. They look to their masters to provide for their needs, and as long as these are supplied, they are content to do what their masters require.All domestic animals need proper food. It must be suitable for them, sufficient in quantity, fresh and clean. Some people feed a pet dog or cat on odds and ends of table scraps, and then wonder why the animal seems listless(倦怠的) and dull. The quantity of food depends on the size of the animal and the amount of exercise it takes. Overfeeding is as bad as underfeeding. Containers for food and water must be washed regularly if the animal is to maintain good health.Even well cared for animals may sometimes fall ill. If this happens, the wise master seeks the best advice he can get. All sorts of medicines and treatments are available for sick animals, and in some countries organizations exist to provide them free or at a cheap price. Useful, friendly, hardworking animals deserve to have some time, money and attention spent on their health.1. What main idea does the author want to convey in the first paragraph?A) There exists thousands of species of animals in the world.B) Man came to establish a close relationship with a number of animals.C) In some regions a donkey seems to be a very useful beast.D) An animal will be useless unless domesticated.2. When an animal is underfed, it will probably ____.A) refuse to obey its masterB) immediately fall illC) require its master to offer some foodD) seek for food on its own3. Which of the following is NOT true of dogs according to the passage?A) They can act as friends, guards, and servants to man.B) They have great adaptation for the environment.C) There live a great variety of breeds of dogs on the globe.D) The Husky and the Saluki are the strongest breed ever known in the world.4. To keep a domestic animal physically fit, its owner is advised ____.A) not to hesitate to spend enormous amount of money on itB) to pay attention to its proper feedingC) not to allow it to take excessive amounts of exerciseD) to join some sort of pet-keeping organizations5. Which of the following would be best TITLE for this passage?A) Domesticated Animals - Man’s Best Fr iendB) Proper Diet - the Road to HealthC) The Advantages of Raising Domestic AnimalsD) Some Tips on Pet-keeping大学四级英语仔细阅读专项习题答案1.B)Man came to establish a close relationship with a number of animals. 黑体部分为第一段两个要点，A只包含了一个要点，C只提到了一头驴。
英语四级CET4阅读练习题及答案
英语四级CET4阅读练习题及答案英语四级CET4精选阅读练习题及答案在当今这个学习英语风潮盛行的社会，英语似乎已经成为了我们生活中不可或缺的一部分，下面是小编为大家搜索整理的英语四级辅导练习，希望能给大家带来帮助!Henry III didn't know much about biology. He went through six wives back in the 1500s, looking for one whocould bear him a son. Scientists now know that it's the father's sperm, not the mother's egg, which determines whether a baby is a boy or a girl. And last week researchers at the Genetics and IVF Institute, a private fertility(生育能力)center in Virginia, announced a new technique that will allow parents to choose the sex of their baby-to-be, before it has even been conceived. The scientist used a tiny laser detector to measure the DNA in millions of sperm cells as they pass single file through a narrow tube, like cattle being herded through a corral(牲口栏). In a study published last week, "girl sperm," which has more DNA—the genetic material—in each cell, was collected, while "boy sperm" was discarded. And when purified girl sperm was used to impregnate(使受孕)a group of mothers, 15 of 17 resulting babies turned out to be girls.The researchers say that "sex selection" can also double a mother's chance of having a son and can be usedto avoid genetic diseases that affect only one gender, such as hemophilia(血友病). But some experts, like New York University fertility specialist Dr. Jamie Grifo, worry that sex selection could lead to a kind ofin uteri(子宫)discrimination, especially in cultures where sons are considered superior to daughters. "It's valuing one gender' over another," Grifo says. "I don't think that's something we should be doing." So far, patients at the institute have been asking for bothboys and girls, in order to "balance" their families. And some ethics experts say that's fine, as long as parents are just looking for a little gender variety. "If you have three boys, and you want a girl," says University of Texas reproductive-law professor John Robertson, "that's not gender bias at all."练习题：Choose correct answers to the question:1.The DNA in the sperm cells can be measured ______.A.in the same way how the cattle are herdedB.when they pass through a tube one behind the otherC.after they pass through a laser tubeD.when they are scanned by a laser detector all at a time2.The gender of the baby is decided by ______.A.the father's DNAB.the mother's DNAC.the father's spermD.the mother's egg3.According to this passage, the practice of "sex selection" ______.A.can help to prevent all genetic problemsB.is totally unacceptable to ethics expertsC.was already realized five hundred years agoD.will benefit families with certain inheritable diseases4.Girl sperm was preferred to boy sperm in the research most probably because____A.girl sperm contains more genetic materialB.more mother want to have girl babiesC.girl sperm is healthier and more activeD.girl sperm is more easily purified5.It can be concluded from the passage that author’stoward”sex selection”is____A.negativeB.positiveC.neutralD.favorable参考答案1.[B] 推理判断题。
大学英语四级阅读题带答案
大学英语四级阅读题带答案大学英语四级阅读题：【原文】Many private institutions of higher education around the country are in danger.Not all will be saved，andperhaps not all deserve to be saved. There are low-quality schools just as there are low-quality business.We have no obligation to save them simply because they exist.But many thriving institutions that deserve to continue are threatened.They are doing a fine job educationally，but they are caught in a financial squeeze，with no way to reduce rising costs or increase revenuessignificantly.Raising tuition doesnt bring in more revenue，for each time tuition goes up，the enrollment goes down，or the amount that must be given away in student aid goes up.Schools are bad businesses，whether public or private，not usually because of mismanagement but because of the nature of the enterprise.They lose money on every customer，and they can go bankrupt either from too few students or too many students.Even a very good college is a very bad business.It is such colleges，thriving but threatened，I worry about.Low enrollment is not their chief problem.Even with full enrollments，they may go under.Efforts to save them，and preferably to keep them private，are a national necessity.There is no basis for arguing that private schools are inherently (固有地)better than public schools.Examples to the contrary abound.Anyone can name state universities and colleges that rankas the finest in the nation and the world.It is now inevitable that public institutions will be dominant，and therefore diversity is a national necessity.Diversity in the way we support schools tends to give us a healthy diversity in the forms of education.In an imperfect society such as ours，uniformity of education throughout the nation could be dangerous.In an imperfect society，diversity is a positive good. Enthusiastic supporters of public higher education know the importance of sustaining private higher education.大学英语四级阅读题：【题目】Choose correct answers to the question：1.According to the authors opinion，schools are bad businesses because of _______.A.mismanagementB.too few studentsC.financial squeezeD.their characteristics2.The author used the phrase “go under” in Para. 3 to mean “_______”。
英语四级阅读理解练习题及解析
英语四级阅读理解练习题及解析(1)【阅读练习】What is it about Americans and food? We love to eat,but we feel 1 about it afterward. We say we want only the bes t, but we strangely enjoy junkfood.We’re 2 with health an d weight loss but face an unprecedented epidemic of obesity(肥胖). Perhaps the 3 to this ambivalence(矛盾情结) lies in our history. The first Europeans cameto this con tinent searching for new spices but went in vain. The first cash crop经(济作物)wasn’t eaten but smoked. Then there was Prohibition, i ntended to prohibit drinking butactually encouraging more 4 ways of doing it.The immigrant experience, too, has been one of inharmony.Do as Romans do meanseating what ―real Americans‖ e at, but our nation’s food has come to be 5 by import—s piz za,say, or hot dogs. And some of thecountry’s most treas ured cooking comes from people whoarrived here in shack les.Perhaps it should come as no surprise then that food has been a medium for the nation’sdefining struggles, whether at the Boston Tea Party or the sit?ins at southern lunch c ounters.It is integral to our concepts of health and even m orality whether one refrains from alcohol forreligious reaso ns or evades meat for political 6But strong opinions have not brought 7 . Americans are a mbivalent about what they putin their mouths. We have b ecome 8 of our foods, especially as we learn more about what theycontain.The 9 in food is still prosperous in the American conscious ness. It’s no coincidence, then,that the first Thanksgiving holds the American imagination in such bondage( 束缚). It’s whatwe eat—and how we 10 it with friends, famil y, and strangers—that help define America as acommunity today.A.answer I. creativeB.result J. beliefC.share K. suspiciousD.guilty L. certaintyE.constant M. obsessedF.defined N. identifyG.vanish O. idealsH.adapted【答案及详解】1. D feel 是一个系动词，可以判断此处应填入一个形容词，通过上下文意思，以及后面介词about, 可以确定选项为D 项guilty, 短语feel guilty about sth. 对……感到有愧‖。
2024四级试题及答案
2024四级试题及答案### 2024年大学英语四级考试试题及答案#### 一、听力部分听力理解（共25分）1. 短对话（共8分）- 问题1：What does the man suggest doing?- 答案：A. Visiting the museum.- 问题2：Why is the woman upset?- 答案：B. She missed the bus.2. 长对话（共10分）- 问题1：What is the main topic of the conversation?- 答案：C. Planning a trip to the countryside.- 问题2：What does the man think of the woman's idea?- 答案：D. He is not very enthusiastic about it.3. 短文理解（共7分）- 问题1：What is the speaker mainly talking about?- 答案：A. The importance of environmental protection.- 问题2：What is the speaker's suggestion for the audience? - 答案：B. To reduce the use of plastic bags.#### 二、阅读部分阅读理解（共20分）1. 快速阅读（共10分）- 问题1：What is the main idea of the passage?- 答案：A. The benefits of regular exercise.- 问题2：What does the author suggest to improve health? - 答案：B. Combining exercise with a healthy diet.2. 仔细阅读（共10分）- 问题1：According to the passage, what is the key to success?- 答案：C. Persistence and hard work.- 问题2：What does the author believe about failure?- 答案：D. It is a stepping stone to success.#### 三、写作部分作文（共15分）题目：The Impact of Technology on Education范文：In recent years, the integration of technology in education has been a topic of much debate. It is undeniable that technology has revolutionized the way we learn and teach. For instance, the use of online platforms and digital resources has made education more accessible and interactive. Students can now access a wealth of information at their fingertips, and teachers can employ various tools to enhance the learning experience.However, there are also concerns about the over-reliance ontechnology. Some argue that it may lead to a decrease in critical thinking skills as students may become too dependent on search engines and online summaries. Additionally, the digital divide can exacerbate educational inequalities, as not all students have equal access to technology.In conclusion, while technology has undoubtedly brought about positive changes in education, it is crucial to strike a balance. Educators should use technology as a tool to complement traditional teaching methods, ensuring that students develop a well-rounded set of skills.#### 四、翻译部分汉译英（共20分）原文：随着经济的快速发展，人们的生活水平有了显著提高。
大学英语四级阅读习题及答案
大学英语四级阅读习题及答案大学英语四级阅读习题(一)1、A2、D3、C4、C5、B大学英语四级阅读习题答案Acculturation, which begins at birth, is the process of teaching new generations of children the customs and values of the parents culture. How people treat newborns, for example, can be indicative of cultural values. In the United States it is not uncommon for parents to put a newborn in a separate room that belongs only to the child. This helps to preserve parents privacy and allows the child to get used to having his or her own room, which is seen as a first step toward personal independence. Americans traditionally have held independence and a closely related value, individualism, in high esteem. Parents try to instill these prevailing values in their children. American English expresses these value preferences: children should "cut the (umbilical) cord" and are encouraged not to be "tied to their mothers apron strings." In the process of their socialization children learn to "look out for number one" and to "stand on their own two feet".Many children are taught at a very early age to make decisions and be responsible for their actions. Often children work for money outside the home as a first step to establishing autonomy. Nine-or ten-year-old children may deliver newspapers in their neighborhoods and save or spend their earnings. Teenagers (13 to 18 years) may baby-sit neighbors homes in order to earn a few dollar a week. Receiving a weekly allowance at an early age teaches children to budget their money, preparing them for future financial independence. Many parents believe that managing money helps children learn responsibility as well as appreciate the value of money.21. According to this passage, the way people treat newborns _____.A) is a sign of their customsB) is an indication of their level of knowledgeC) symbolizes their social systemD) varies from culture to culture22. The expression, "to cut the cord", is used to show that _____.A) children dont like their parentsB) parents dont feel close to their childrenC) parents would not like to live together with their childrenD) independence from ones family is an important personal goal in USA23. Children who are "tied to the apron strings" _____.A) are caught in their mothers apronsB) must always wear an apron when they eatC) are very dependent on their mothersD) are independent from their parents24. American people often let their children work for money outside the home at a very early age because _____.A) children have to earn money to help the familyB) they need more moneyC) they want them to begin establishing autonomyD) children have to save money for future use25. It can be inferred from this passage that _____.A) Americans are money loversB) Americans admire independenceC) Americans are good at decision-makingD) Americans are all responsible大学英语四级阅读习题(二)Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (裁判) decisions that denied victory to their team. A researcher was appointed to study the performance of some top referees.The researcher organized an experimental tournament (锦标赛) involving four youth teams. Each match lasted an hour, divided into three periods of 20 minutes during which different referees were in charge.Observers noted down the referees errors, of which there were 61 over the tournament. Converted to a standard match of 90 minutes, each referee made almost 23 mistakes, a remarkably high number.The researcher then studied the videotapes to analyse the matches in detail. Surprisingly, he found that errors were more likely when the referees were close to the incident. When the officials got it right, they were, on average, 17 meters away from the action. The average distance in the case of errors was 12 meters. The research shows the optimum (最佳的) distance is about 20 meters.There also seemed to be an optimum speed. Correct decisions came when the referees were moving at a speed of about 2 meters per second. The average speed for errors was 4 meters per second.If FIFA, footballs international ruling body, wants to improve the standard of refereeing at the next World Cup, it should encourage referees to keep their eyes on the action from a distance, rather than rushing to keep up with the ball, the researcher argues.He also says that FIFAs insistence that referees should retire at age 45 may be misguided. If keeping up with the action is not so important, their physical condition is less critical.21. The experiment conducted by the researcher was meant to ________.A) review the decisions of referees at the 1998 World CupB) analyse the causes of errors made by football refereesC) set a standard for football refereeingD) reexamine the rules for football refereeing22. The number of refereeing errors in the experimental matches was ________.A) slightly above averageB) higher than in the 1998 World CupC) quite unexpectedD) as high as in a standard match23. The findings of the experiment show that ________.A) errors are more likely when a referee keeps close to the ballB) the farther the referee is from the incident, the fewer the errorsC) the more slowly the referee runs, the more likely will errors occurD) errors are less likely when a referee stays in one spot24. The word “officials” (Line 2, Para. 4) most probably refers to ________.A) the researchers involved in the experimentB) the inspectors of the football tournamentC) the referees of the football tournamentD) the observers at the site of the experiment25. What is one of the possible conclusions of the experiment?A) The ideal retirement age for an experienced football referee is45.B) Age should not be the chief consideration in choosing a football referee.C) A football referee should be as young and energetic as possible.D) An experienced football referee can do well even when in poor physical condition.。
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四级英语阅读专项练习带答案
导读：我根据大家的需要整理了一份关于《四级英语阅读专项练习带答案》的内容，具体内容：阅读题在四级考试占有举足轻重的地位，需要考生平时重视阅读练习。
下面我为大家带来，欢迎各位同学练习。
四级英语阅读专项练习原文The food we eat seems t...
阅读题在四级考试占有举足轻重的地位，需要考生平时重视阅读练习。
下面我为大家带来，欢迎各位同学练习。
四级英语阅读专项练习原文
The food we eat seems to have profound effects on our
health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additivies,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which
things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue.
四级英语阅读专项练习题目
1.What is the best possible title of the passage?
a.Drug and Food
b.Cancer and Health
c.Food and Health
d.Health and Drug
2.Which of the following statements is NOT ture?
a.Drugs are always given to animals for medical reasons
b.Some of the additives in our food are added to the food itself and some are given to the living animals
c.Researchers have known about the potential dangers of food additives for over thirty-five years.
d.Food may cause forty percent of cancer in world.
3.How has science done something harmful to mankind?
a.Because of science , diseases caused by polluted food haven been virtually eliminated.
b.It has caused a lack of information concerning the value of food.
c.Because of the application of science,some potentially harmful substances have been added to foo
d.
d.The scientists have preserved the color of meats,but not of vegetables.
4.What are nitrates used for?
a.They preserve flavor in packaged foods.
b.They preserve the color of meats.
c.They are the objects of research.
d.They cause the animals to become fatter.
5.The word carcinogenic most nearly means _____.
a.trouble-making
b.color-retaining
c.money-making
d.cancer-causing
四级英语阅读专项练习答案
cacbd。