[大学英语考试复习资料]大学英语四级分类模拟题523

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大学英语四级考试模拟试题(附答案)

大学英语四级考试模拟试题（附答案）一、写作Directions: For this part, you are allowed 30 minutes to write a short essay on the topic of "The Importance of Learning a Second Language". You should write at least 120 words but no more than 180 words.【答案】The Importance of Learning a Second LanguageSecondly, learning a second language improves cognitive abilities. Studies have shown that bilingual individuals often exhibit better problemsolving skills, greater creativity, and a more flexible mindset. Moreover, mastering a second language can open up numerous career opportunities. In an increasingly globalized job market, being proficient in multiple languages is a valuable asset.In conclusion, the benefits of learning a second language are multifaceted, ranging from personal growth to career advancement and cultural preservation. It is a lifelong investment that yields significant rewards.二、听力理解Section ADirections: In this section, you will hear eight short conversations and two long conversations. At the end of eachconversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question, there will be a pause. During the pause, you must read the four choices marked A), B), C), and D), and decide which is the best answer. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.1. A) The woman doesn't want to cook dinner.B) The man will cook dinner for the woman.C) They are going to eat out.D) They are discussing the menu for tomorrow.【答案】C)Section BDirections: In this section, you will hear two passages. At the end of each passage, you will hear three or four questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C), and D). Then mark the corresponding letter on the Answer Sheet with a single line through the centre.Passage One2. A) It is a way to express individuality.B) It is a sign of social status.C) It reflects cultural background.D) It is a form of artistic expression.【答案】A)三、阅读理解Section ADirections: In this section, there is a passage with ten blanks. You are required to select one word for each blankfrom a list of choices given in a word bank following the passage. Read the passage through carefully before makingyour choices. Each choice in the bank is identified a letter. Please mark the corresponding letter for each item on the Answer Sheet with a single line through the centre. You maynot use any of the words in the bank more than once.Passage【答案】26. D) substantial27. A) outweigh28. C) enhance四、翻译Directions: For this part, you are allowed 30 minutes to translate a passage from Chinese into English. You shouldwrite your answer on the Answer Sheet.中国传统文化中，龙是吉祥的象征，代表着权力、威严和好运。

大学英语四级考试模拟试题

大学英语四级考试模拟试题一、单选题（共10题，共20分）1._________,the most controversial candidate in the election campaign,he has been strongly criticized for his crude comments about women.A.QuestionablyB.ArguablyC.ContentiouslyD.DebatablyABCD正确答案：B2.She’s worn his designs on__________occasions from red carpets to movie premieres.A.countlessB.countableC.numericalD.numeralABCD正确答案：A3.The school is going the________mile to create the next generation of sporting stars thanks to its unique development program.A.finalB.furtherC.supplementaryD.extraABCD正确答案：D4.The celebrity says in court papers she“has no__________of giving any authorization to anyone to proceed with a divorce.”A.recommendationB.recordingC.recollectionD.recognitionABCD正确答案：C5.My mother was determined to help those in need and she would have been immensely proud of what has been achieved these last20years.The italicized part in the sentence expresses _______.A.a hypothesisB.a suggestionC.a contradictionD.a surpriseABCD正确答案：A6.Last March the__________of a19th century cargo ship was found by an underwater archaeological team.A.debrisB.ruinsC.remainsD.wreckABCD正确答案：D7.She hired a lawyer to investigate,only to learn that Gabriel had removed her name from the deed.The infinitive verb phrase“only to learn”is used____.A.to express an intended purposeB.to indicate a high degree of possibilityC.to reveal an undesirable consequenceD.to dramatize a stated factABCD正确答案：C8.Indeed,it is arguable that body shattering is the very point of football,as killing and maiming___.A.warB.are warC.of warD.are of warABCD正确答案：D9.She was once a young country wife with chickens in the backyard and a view of _______mountains behind the apple orchard.A.blue hazy VirginiaB.hazy blue VirginiaC.Virginia hazy blueD.Virginia blue hazyABCD正确答案：B10.U.S.News____________rankings of colleges since1983.They are a very popular resource for students looking to apply to university campus.A.maintainsB.is maintainingC.maintainedD.has been maintainingABCD正确答案：D二、问答题（共10题，共100分）11.Part IV TranslationCulture shock is caused by the anxiety that results from losing all familiar signs and symbols of social intercourse.(Passage Four)正确答案：文化震撼是由于社会交往过程中失去了所有本来熟悉的标记和符号引起焦虑而产生的。

大学英语四级考试模拟题 (附答案)

大学英语模拟真题Test 2第一部分：交际用语（共5小题；每小题3分，满分15分）此部分共有5个未完成的对话，针对每个对话中未完成的部分有4个选项，请从A、B、C、D四个选项中选出可以填入空白处的最佳选项。

1. —Why not go and have dinner in the restaurant?—_________ It’s too expensive.A. Why not.B. I agree .C. I’m afraid not.D. I’m sure.2. —Mike,I am going to skate in the mountains tomorrow.—Oh,really? _________A. Good luck.B. Great.C. Have a good time.D. Congratulations!3. —Please help yourself to the fish.—_________A. Thanks,but I don’t like the fish.B. Sorr y,I can’t help.C. Well,fish don’t suit me.D. No,I can’t.4. —_________—He teaches physics in a school.A. What does your father want to do?B. Who is your father?C. What is your father?D. Where is your father now?5. —Excuse me, how much is the jacket?—It’s 499 Yuan. _________A. Oh, no. Tha t’s OK!B. How do you like it?C. Which do you prefer?D. Would you like to try it on?第二部分：阅读理解（共10小题；每小题3分，满分30分）此部分共有2篇短文，在第一篇短文后有5个正误判断题，从每题后的两个选项中选出正确答案；在第二篇短文后有5个问题。

英语四级考试题模拟及答案

英语四级考试题模拟及答案英语四级考试是许多大学生必须通过的一项考试，它是考察英语能力的重要指标之一。

为了帮助考生更好地备考，以下是一份英语四级考试题目模拟及答案，供参考学习。

一、听力部分1. What does the woman advise the man to do?A. Change his major.B. Study harder.C. Take fewer courses.D. Drop the course.2. What does the woman think of their food?A. Delicious.B. Too salty.C. Overpriced.D. Terrible.3. Where is the man planning to go?A. To the library.B. To the bookstore.C. To the office.D. To the cafeteria.答案：1. B. Study harder.2. A. Delicious.3. B. To the bookstore.二、阅读部分Questions 4 to 6 are based on the following passage:Most experts agree countries need to start seriously slashing greenhouse gas emissions.. and that we can continue emitting greenhouse gases for only another 10 to 15 years before crossing a threshold into a more extreme climate.4. What do most experts agree on?A. Greenhouse gas emissions need to be increased.B. Greenhouse gas emissions need to be seriously reduced.C. Greenhouse gas emissions have no impact on the climate.D. Greenhouse gas emissions can continue as they are.5. How many years do most experts believe we have before crossing a threshold into a more extreme climate?A. 5 to 10 years.B. 10 to 15 years.C. 15 to 20 years.D. 20 to 25 years.6. What is the main idea of the passage?A. Countries should ignore greenhouse gas emissions.B. Countries have plenty of time to reduce greenhouse gas emissions.C. Countries must act now to reduce greenhouse gas emissions.D. Countries will not be affected by greenhouse gas emissions.答案：4. B. Greenhouse gas emissions need to be seriously reduced.5. B. 10 to 15 years.6. C. Countries must act now to reduce greenhouse gas emissions.三、写作部分请根据以下题目写一篇短文：题目：Does social media have a positive or negative impact on society?参考范文：Social media has become an indispensable part of our lives, with millions of people using platforms such as Facebook, Twitter, and Instagram on a daily basis. While social media has its benefits, such as connecting people from all around the world and providing a platform for sharing information and ideas, it also has negative impacts on society.One of the positive aspects of social media is its ability to bring people together. It allows individuals to stay in touch with friends and family, no matter where they are located. Social media also provides a platform for sharing news and information quickly and easily, which can be beneficial in emergency situations.However, social media also has negative impacts on society. One of the biggest concerns is the spread of fake news and misinformation. With the rise of social media, it has become increasingly difficult to distinguish between reliable sources and fake news. This can lead to a misinformed public and have serious consequences for society.Furthermore, social media can have a negative impact on mental health. Studies have shown that excessive use of social media can lead to feelings of loneliness, anxiety, and depression. The constant comparison to others on social media can also lead to low self-esteem and self-worth.In conclusion, while social media has its benefits, such as connecting people and sharing information, it also has negative impacts on society, such as the spread of fake news and negative effects on mental health. It is important for individuals to use social media responsibly and critically evaluate the information they see online.以上是一份英语四级考试题目模拟及答案，希望对大家备考有所帮助。

大学专业英语四级考试语言知识分类模拟测试卷(带答案)

大学专业英语四级考试语言知识分类模拟测试卷LANGUAGE USAGE1、He stole, not because he needed the money badly but because he enjoyed stealing. The italicized part functions as a(n) ______ in the sentence.A. subjunctive moodB. attributiveC. adverbialD. complement2、The storm sweeping over SW China is sure to lead to ______ of vegetables in the following days.A. validityB. varietyC. scarcityD. rarity3、Please come to the point; you are ______ the subject again.A. straying fromB. getting offC. dwelling inD. giving up4、By the time you graduate from college, we ______ in Australia for one year.A. will be stayingB. will have stayedC. would have stayedD. have stayed5、"Hotel workers suspect that the fire was ignited by a cigarette and that a guest may have thrown the cigarette into a bush from the pool deck." The modal auxiliary verb phrase "may have thrown" in the sentence expresses ______.A. high possibility in the pastB. low possibility in the presentC. high possibility in the presentD. low possibility in the past6、In reading stories we anticipate what is to come ______ on our memory of what has gone before.A. basedB. basingC. to baseD. to be based7、______ can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of his condition.A. AsB. WhatC. ThatD. It8、If you have a violin, you need to invest the money required to keep it tuned and in good working ______.A. circumstanceB. formC. orderD. state9、In the sentence "It is necessary that a meeting be convened this week", the italicized part is ______.A. the subjectB. the objectC. an attributeD. an adverbial10、Operations which left patients ______ and in need of long periods of discovery time now leave them feeling relaxed and comfortable.A. exhaustedB. unhealthyC. upsetD. fearful11、My sister will be here tomorrow, but at first I thought that she ______ today.A. was comingB. is comingC. must comeD. may come12、Your ways to solve this problem ______, seem pretty effective.A. similar to herB. like herC. like hersD. similar to herself13、As a ______ actor, he can perform, sing, dance and play several kinds of musical instruments.A. flexibleB. versatileC. sophisticatedD. productive14、All the information we have collected in relation to that case ______ very little.A. comes up toB. makes up forC. stands up forD. adds up to15、The president of the college, together with the deans, ______ planning a conference for the purpose of laying down a series of regulations.A. wereB. areC. isD. will16、______ Mike! I knew he would get the first prize in the race.A. Thank goodnessB. Goodness knowsC. Good oldD. Thanks17、I ______ heard the loudspeaker calling passengers for the Turin-Amsterdam flight.A. distinctivelyB. distinctlyC. distastefullyD. disgustingly18、His ______ in gambling has eventually brought about his ruin.A. indulgenceB. endeavourC. actionD. engagement19、Which of the following italicized parts is an appositive clause?A. They were surprised at the fact that ocean ships can sail up the Great Lakes.B. I have read all the books that you gave me.C. He told me that he would go to the college the next year.D. The truth is that I didn't finish my term essay.20、Prices have recently risen in order to ______ the increased cost of raw materials.A. cutB. buoyC. offerD. offset21、If you explained the situation to your solicitor, he ______ able to advise you much better than I can.A. would beB. will have beenC. wasD. were22、If not stored in the fridge, food is ______ to deteriorate in summer.A. feasibleB. appropriateC. aptD. fitting23、How can I concentrate if you ______ continually ______ me with silly questions?A. have...interruptedB. are...interruptedC. had...interruptingD. were...interrupting24、Which of the following words can NOT be used to complete "______ the teachers came"?A. OftenB. NearlyC. EventuallyD. Almost25、The grand hall was renovated and now it can ______ eight hundred people.A. compriseB. embodyC. containD. include26、We will be losing money this year unless that new economic plan of yours ______ miracle.A. is workingB. worksC. will be workingD. worked27、Which of the following sentences is NOT an elliptical sentence(省略句)?A. Our teacher came in, book in hand.B. These are Tom's books and those are Lily's.C. You shouldn't come here unless invited.D. The way that you answered this question was admirable.28、The loss of the rain forests would upset the climates of tropical countries, bringing droughts and floods and ______ soil.A. fertileB. sterileC. hostileD. serial29、Which of the following italicized phrases indicates CAUSE?A. We could hardly see for the mist.B. He went out for a walk.C. I've got a present for you.D. For miles and miles we saw nothing but trees.30、Which of the following sentences is INCORRECT?A. I slept, and dreamt that life was beauty; I woke and found that life was duty.B. I thought the technician was to blame for the blowing of the fuse, but I see now how I was mistaken.C. The teacher told his class that light travels faster than sound.D. We all find it important that we (should) make a quick decision about this matter.31、Realizing that he hadn't enough money and ______ to borrow from his father, he decided to sell his watch.A. not wantedB. not to wantC. not wantingD. wanting not32、The sun rises in the east and sets in the west, so it seems as if the sun ______ round the earth.A. had circledB. was circlingC. might circleD. were circling33、A new laptop costs about ______ of a second-hand one.A. the price of three timesB. three times the priceC. as much as the three times priceD. three times more than the price34、The child blew up the balloon until it ______.A. smashedB. crackedC. fracturedD. burst35、Somehow he ______ through his speech and sat down with great relief.A. fumblesB. tumblesC. stumblesD. rumbles36、Scientists believe that color blindness is a(n) ______ defect, and there is no cure of it.A. inducedB. originalC. primitiveD. inherited37、When he was driving home, he was stopped by the policeman and was ______ of speeding.A. chargedB. blamedC. accusedD. warned38、Researchers are discovering a wealth of genes that ______ once thought ______ only in animals.A. are... to existB. are... existingC. were... to existD. were... existing39、They failed six times but they have made their minds to try ______.A. seven timesB. seventh timeC. a seventh timeD. the seventh time40、Which of the italicized parts is used as an object complement?A. Her mind is becoming unhinged (精神失常).B. His words went unbelieved by us.C. Please keep us informed of the latest news.D. The playground lay deserted.答案:LANGUAGE USAGE1、C[解析] 根据分析可知，斜体部分是对前面的盗窃行为进行的解释说明，属于原因状语从句，因此答案为C。

大学英语四级备考模拟题及答案

大学英语四级备考模拟题及答案2016年大学英语四级备考模拟题及答案Part II Reading Comprehension (35 minutes)Directions: There are 4 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center. Passage OneQuestions 21 to 25 are based on the following passage.There is a difference between science and technology. Science is a method of answering theoretical questions; technology is a method of solving practical problems. Science has to do with discovering the facts and relationships between observable phenomena in nature and with establishing theories that serve to organize these facts and relationships; technology has to do with tools, techniques, and procedures for implementing the finding of science.Another distinction between science and technology has to do with the progress in each.Progress in science excludes the human factor. Scientists, who seek to comprehend the universe and know the truth within the highest degree of accuracy and certainty, cannot pay attention to their own or other people's likes or dislikes or to popular ideas about the fitness of things. What scientists discover may shock or anger people-as did Darwin's theory of evolution. But even an unpleasant truth is more than likely to be useful; besides, we have the choice of refusing to believe it! But hardly so with technology; we do not have the choice of refusing to hearthe sonic boom produced by a supersonic aircraft flying overhead; we do not have the option of refusing to breathe polluted air; and we do not have the option of living in a non-atomic age. Unlike science progress, technology must be measured in terms of the human factor. The legitimate purpose of technology is to serve people in general, not merely some people; and future generations, not merely those who presently wish to gain advantage for themselves. Technology must be humanistic if it is to lead to a better world.21. The difference between science and technology lies in that _____.A) the former provides answers to theoretical questions while the latter to practical problemsB) the former seeks to comprehend the universe while the latter helps change the material worldC) the former aims to discover the inter-connections of facts and the rules that explain them while the latter, to discover new designs and ways of making the things we use in our daily lifeD) all of the above22. Which of the following may be representative of science?A) The improvement of people's life.B) The theory of people's life.C) Farming tools.D) Mass production.23. According to the author, scientific theories _____.A) must be strictly objectiveB) usually take into consideration people's likes and dislikesC) should conform to popular opinionsD) always appear in perfect and finished forms24. The author states that technology itself _____.A) is responsible for widespread pollution and resource exhaustionB) should serve those who wish to gain advantage for themselvesC) will lead to a better world if put to wise useD) will inevitably be for bad purpose25. The tone of the author in this passage is _____.A) positive B) negative C) factual D) critical Passage TwoQuestions 26 to 30 are based on the following passage.Americans have always been ambivalent in their attitudes toward education. On the one hand, free and universal public education was seen as necessary in a democracy, for how else would citizens learn how to govern themselves in a responsible way? On the other hand, America was always a country that offered financial opportunities for which education was not needed: on the road from rags to riches, schooling-beyond the basics of reading, writing, and arithmetic-was an unnecessary detour.Even today, it is still possible for people to achieve financial success without much education, but the number of situations in which this is possible is decreasing. In today's more complex world, the opportunities for financial success is closely related to the need for education, especially higher education.Our society is rapidly becoming one whose chief product is information, and dealing with this information requires more and more specialized education. In other words, we grow up learning more and more about fewer and fewer subjects.In the future, this trend is likely to continue. Tomorrow's world will be even more complex than today's world, and, to manage this complexity, even more specialized education will beneeded.26. The topic treated in this passage is _____.A) education in general B) Americans' attitudesC) higher education D) American education27. Americans' attitudes toward education have always been _____.A) certain B) contradictory C) ambitious D) unclear28. Today, financial success is closely related to the need for _____.A) higher education B) public education C) responsible citizens D) learning the basics29. It can be inferred from the third paragraph that _____.A) information is our only productB) education in the future will be specializedC) we are entering an age of informationD) we are living in an age of information30. Which of the following is the best title for the passage?A) The History of American Education.B) The Need for Specialized Education.C) The Future of the American Educational System.D) Attitudes toward American Education. Passage ThreeQuestions 31 to 35 are based on the following passage.A growing world population and the discoveries of science may alter this pattern of distribution in the future. As men slowly learn to master diseases, control floods, prevent famines, and stop wars, fewer people die every year; and in consequence the population of the world is steadily increasing. In 1925 there were about 2,000 million people in the world; by the end of the century there may well be over 4,000 million.When numbers rise the extra mouths must be fed. New landsmust be brought under cultivation, or land already farmed made to yield larger crops. In some areas the accessible land is so intensively cultivated that it will be difficult to make it provide more food. In some areas the population is so dense that the land is parceled out in units too tiny to allow for much improvement in farming methods. Were a large part of this farming population drawn off into industrial occupations, the land might be farmed much more productively by modern methods. There is now a race for science, technology, and industry to keep the output of food rising faster than the number of people to be fed. New strains of crops are being developed which will thrive in unfavorable climates: there are now farms beyond the Arctic Circle in Siberia and North America; irrigation and dry-farming methods bring arid lands under the plough, dams hold back the waters of great rivers to ensure water for the fields in all seasons and to provide electric power for new industries; industrial chemistry provides fertilizers to suit particular soils; aeroplanes spray crops to destroy locusts and many plant diseases. Every year some new means is devised to increase or to protect the food of the world.31. The author says that the world population is growing because _____.A) there are many rich valleys and fertile plainsB) the pattern of distribution is being alteredC) people are living longerD) new land is being brought under cultivation32. The author says that in densely populated areas the land might be more productively farmed if _____.A) the plots were subdividedB) a large part of the people moved to a different part of the countryC) industrial methods were used in farmingD) the units of land were made much larger33. We are told that there are now farms beyond the Arctic Circle. This has been made possible by _____.A) producing new strains of cropsB) irrigation and dry-farming methodsC) providing fertilizersD) destroying pests and disease34. Which of these words is nearest in meaning to the word "strains"?A) types B) sizes C) seeds D) harvests35. The author's main purpose is to _____.A) argue for a belief B) describe a phenomenonC) entertain D) propose a conclusion Passage FourQuestions 36 to 40 are based on the following passage.For some time past it has been widely accepted that babies-and other creatures-learn to do things because certain acts lead to "rewards"; and there is no reason to doubt that this is true. But it used also to be widely believed that effective rewards, at least in the early stages, had to be directly related to such basic physiological(生理的) "drives" as thirst or hunger. In other words, a baby would learn if he got food or drink or some sort of physical comfort, not otherwise.It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome.Papousek began his studies by using milk in the normal way to "reward" the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drinkwould refuse the milk but would still go on making the learned response with clear signs of pleasure. So he began to study the children's responses in situations where no milk was provided. He quickly found that children as young as four months would learn to turn their heads to right or left if the movement "switched on"a display of lights-and indeed that they were capable of learning quite complex turns to bring about this result, for instance, two left or two right, or even to make as many as three turns to one side.Papousek's light display was placed directly in front of the babies and he made the interesting observation that sometimes they would not turn back to watch the lights closely although they would "smile and bubble" when the display came on. Papousek concluded that it was not primarily the sight of the lights which pleased them, it was the success they were achieving in solving the problem, in mastering the skill, and that there exists a fundamental human urge to make sense of the world and bring it under intentional control.36. According to the author, babies learn to do things which .A) are directly related to pleasure B) will meet their physical needsC) will bring them a feeling of success D) will satisfy their curiosity37. Papousek noticed in his studies that a baby .A) would make learned responses when it saw the milkB) would carry out learned movements when it had enough to drinkC) would continue the simple movements without being given milkD) would turn its head to right or left when it had enough to drink38. In Papousek's experiment babies make learned movements of the head in order to .A) have the lights turned onB) be rewarded with milkC) please their parentsD) be praised39. The babies would "smile and bubble" at the lights because .A) the lights were directly related to some basic "drives"B) the sight of the lights was interestingC) they need not turn back to watch the lightsD) they succeeded in "switching on" the lights40. According to Papousek, the pleasure babies get in achieving something is a reflection of .A) a basic human desire to understand and control the worldB) the satisfaction of certain physiological needsC) their strong desire to solve complex problemsD) a fundamental human urge to display their learned skills。

大学英语四级考试模拟试卷(附答案)

大学英语四级考试模拟试卷Part ⅠWritingDirections:For this part, you are allowed 30 minutes to write a letter of advice to your cousin about how to spend the first winter holiday in college. You should write at least 120 words following the outline given below.1、现在网上购物已成为一种时尚2．网上购物有很多好处，但也有不少问题3．我的建议Part ⅡReading Comprehension (Skimming and Scanning)Exchange Rates：A Brief History of Exchange RatesFor centuries，the currencies of the world were backed by gold．That is，a piece of paper currency issued by any world government represented a real amount of gold held in a vault by that government．In the 1930s，the U.S.set the value of the dollar at 8 single，unchanging level：l ounce of gold was worth $35．After World War II，other countries based the value of their currencies on the U.S.dollar．Since everyone knew how much gold a U.S.dollar was worth，then the value of any other currency against the dollar could be based on its value in gold．A currency worth twice as much gold as a U.S.dollar was，therefore，also worth two U.S.dollars．Unfortunately，the real world of economics outpaced this system．The U.S.dollar suffered from inflation(its value relative to the goods it could purchase decreased)，while other currencies became more valuable and more stable．Finally，in 1971，the U.S.took away the gold standard altogether．This meant that the dollar no longer represented an actual amount of a precious substance-market forces alone determined its value．Today，the U.S.dollar still dominates many financial markets．In fact，exchange rates are often expressed in terms of U.S.dollars．Currently，the U.S.dollar and the euro account for approximately 50 percent of all currency exchange transactions in the world．Adding British pounds，Canadian dollars，Australian dollars，and Japanese yen to the list accounts for over 80 percent of currency exchanges altogether．Methods of Exchange：the Floating Exchange RateThere are two main systems used to determine a currency's exchange rate：floating currency and pegged currency．The market determines a floating exchange rate．In other words，a currency is worth whatever buyers are willing to pay for it．This is determined by supply and demand，which is in turn driven by foreign investment，import/export ratios，inflation，and a host of other economic factors．Generally，countries with mature，stable economic markets will use a floating system．Virtually every major nation uses this system，including the U.S.，Canada and Great Britain．Floating exchange rates are considered more efficient，because the market will automatically correct the rate to reflect inflation and other economic forces．The floating system isn't perfect，though．If a country's economy suffers from instability，a floating system will discourage investment．Investors could fall victim to wild swings in the exchange rates，as well as disastrous inflation．Methods of Exchange：the Pegged Exchange RateA pegged，or fixed system，is one in which the exchange rate is set and artificially maintained by the government．The rate will be pegged to some other country's dollar，usually the U.S.dollar．The rate will not fluctuate from day to day．A government has to work to keep their pegged rate stable．Their national bank must hold large reserves of foreign currency to mitigate changes in supply and demand．If a sudden demand for a currency was to drive up the exchange rate，the national bank would have to release enough of that currency into the market to meet the demand．They can also buy up currency if low demand is lowering exchange rates．Countries that have immature，potentially unstable economies usually use a pegged system．Developing nations can use this system to prevent out-of-control inflation．The system can backfire，however，if the real world market value of the currency is not reflected by the pegged rate．In that case，a black market may spring up，where the currency will be traded at its market value，disregarding the government's peg．When people realize that their currency isn’t worth as much as the pegged rate indicates，they may rush to exchange their money for other，more stable currencies．This can lead to economic disaster，since the sudden flood of currency in world markets drives the exchange rate very low．So if a country doesn't take good care of their pegged rate，they may find themselves with worthless currency．Methods of Exchange：HybridsIn reality，few exchange rate systems are 100 percent floating，or 100 percent pegged.Countries using a pegged rate can avoid market panics and inflationary disasters by using a floating peg．They peg their rate to the U.S.dollar，and that rate doesn't fluctuate from day to day．However，the government periodically reviews their peg，and makes minor adjustments to keep it in line with the true market value。

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as global temperatures rise, but that adaptation can help slow the decline for some crops.
For corn, the anticipated loss is roughly 10 percent, the research shows. Farmers of these crops have already seen yield growth slow down since 1980 as temperatures have risen, though other policy and economic factors have also played a role.
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[大学英语考试复习资料]大学英语四级分类模拟题 523
Moore described the results as somewhat surprising because Europe is fairly cool. "So you might think it would benefit from moderate amounts of warming," she said. "Our next step was to actually measure the potential of European farmers to adapt to these impacts."
该段第二句中指出种植这些作物的农场主已经发现自1980年以来随着气温的升高作物产量的增长速度逐渐放缓尽管其他政策和经济因素对此也有一定影响
[大学英语考试复习资料]大学英语四级分类模拟题 523
[大学英语考试复习资料]大学英语四级分类模拟题 523
大学英语四级分类模拟题 523
Part Ⅰ Writing 问题:1. Directions: For this part, you are allowed 30 minutes to write a campaign speech in support of your election to the post of chairman of the Student Union. You should write at least 120 words following the outline given below in Chinese.
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[大学英语考试复习资料]大学英语四级分类模拟题 523
diligent man with pleasant personality, I have always been considered to be a good team member. Moreover, as a big fan of sports, it is essential to realize the importance of teamwork and advocate the spirit of being quicker and stronger. I possess strong determination to take firm steps toward achieving the objectives of my team. My working experience with the Student Union in the past two years will still be extremely helpful to my future work here if I get elected.
I believe that the sign of a really strong organization is that it can change its leadership without hindering its progress and without damaging its values. If I am elected, I believe I have the capability to lead the Union to advance in the right direction. I will cooperate well with my fellow members of the Union and take innovative measures, including forming a teacher-student-friendship association, establishing a student-information center, making the Union a true assistance to students' study and life here as well as a bridge of communication between teachers and students.
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[大学英语考试复习资料]大学英语四级分类模拟题 523
farmers will use the available options for adapting. Europe has already seen a lot of warming, so we should expect to already see adaptation if farmers are quick to respond to climate signals." 1. What does the new Stanford research show? A.People can do nothing about global warming. B.The influence of global temperature rise is increasing. C.People can do something to slow the decline for some crops. D.All crops' yields will decline as global temperatures rise. 答案:C[解析] 根据题干中的 the new Stanford research show 定位到原文第一段。该段中指出，斯坦福大学的新研究显示，欧洲的农场主将看到全球气温升高对农作物产量的影响，但适应变化就能减缓部分作物产量的下降。由此可知，对于作物产量的下降，人们还是可以采取一些措施使之放缓的，C 项表述正确。A、D 两项表述与原文不符，B 项表述在原文中并未提及，故选 C。 2. What happened to the crop yields since 1980? A.The yields of all the crops have been declining. B.The yield growth of some crops becomes slower. C.The global temperatures become not so stable as before. D.Policy and economic factors began to affect crop yields. 答案:B[解析] 根据题干中的 1980 定位到原文第二段。该段第二句中指出，种植这些作物的农场主已经发现，自 1980 年以来，随着气温
"This paper has shown that crops in Europe are sensitive to warming and that adaptation can be important in reducing that impact," Moore said. "The next question is how quickly
"The results clearly showed that modest amounts of climate change can have a big impact on yields of several crops in Europe," said Stanford doctoral student Frances Moore, who conducted the research with David Lobell, an associate professor of environmental Earth system science.
Thank you very much.
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[大学英语考试复习资料]大学英语四级分类模拟题 523
Part Ⅱ Reading Comprehension
Passage One European Farmers: Importance of Adapting to Climate
Change New Stanford research reveals that farmers in Europe will
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[大学英语考试复习资料]大学英语四级分类模拟题 523
的升高，作物产量的增长速度逐渐放缓，尽管其他政策和经济因素对此也有一定影响。由此可见，B 项表述符合原文，故选 B。 3. What does Moore think about the results of their research? A.Unexpected. B.Unbelievable. C.Alarming. D.Pessimistic. 答案:A[解析] 根据题干中的 Moore think about the results 定位到原文第四段。该段首句中指出，穆尔对研究结果略感惊讶，因为欧洲还是相当凉爽的。四个选项与原文中的 surprising“令人感到意外的” 意义最为接近的是 Unexpected，故选 A。 4. What can be counted as "adaption" according to Lobell? A.Exploring new technologies. B.Grow crops in greenhouses. C.Install irrigating systems. D.Release less greenhouse gases. 答案:C[解析] 根据题干中的 be counted as "adaption" according to Lobell 定位到原文第五段。该段首句中罗贝尔说道：“在我们看来，‘适应’就是以现有技术为基础的一系列措施，如更换作物品种，安装灌溉设施或种植一种完全不同的但能适应较高温度的作物。”四个选项中符合原文的只有 C 项，故选 C。 5. What does Moore suggest in the last paragraph?