大学英语四选择题

大学英语四选择题
大学英语四选择题

U04-B

1. The class remained __C__ when the teacher asked a formidable question.

A) clumsy B) deaf

C) dumb D) still

2. The captured criminals were __C__ in chains through the streets.

A) exhibited B) displayed

C) paraded D) revealed

3. As a summary, the long story was __A__ into a few sentences.

A) condensed B) condemned

C) concealed D) concentrated

4. She took an __C__ course in cooking before her marriage.

A) integral B) intentional

C) intensive D) intense

5. Deeply cursed with prison life, the prisoners became __D__ for breakout.

A) discarded B) disappointed

C) intensive D) desperate

6. Being very hungry, she gave the two dishes a thorough __C__.

A) script B) click

C) lick D) scrape

7. The problem with the country is how to lift its economy out of __D__.

A) reservation B) recreation

C) reversion D) recession

8. Be careful with a cat. It may __D__ you if you make it angry.

A) punch B) scrape

C) tear D) scratch

9. He __A__ much of his time in learning the new language.

A) invested B) involved

C) invented D) integrated

10. The farmers were more anxious for rain than the people in the city because they had more at __B__

A) danger B) stake

C) loss D) threat

11. The __B__ on this apartment runs out in a year’s time.

A) treaty B) lease

C) agenda D) deadline

12. He has put his car entirely at our __D__ for the holiday.

A) usage B) application

C) disposition D) disposal

13. The town planning commission said that their financial outlook for the next year was optimistic. They expected increased tax __C__.

A) efficiency B) privileges

C) revenues D) validity

14. If you __A__ in taking this attitude, we’ll have to ask you to leave.

A) persist B) insist

C) resist D) assist

15. The rest of the family had nearly reached the river, but Jane was __D__ behind as usual.

A) declining B) delaying

C) lacking D) lagging

16. Communication is the process of __A__ a message from a source to an audience via a channel.

A) transmitting B) submitting

C) transforming D) switching

17. The computer has become smaller and cheaper and __B__ more available to a greater number of people.

A) yet B) hence

C) still D) nevertheless

18. Take one __D__ of this cough-mixture three times a day.

A) therapy B) prescription

C) injection D) dose

19. John Smith is the New York Times __B__ at Beijing.

A) resident B) correspondent

C) ambassador D) applicant

20. Today, many __D__ products have replaced natural ones.

A) practical B) compound

C) raw D) synthetic

21. Improved consumer confidence is __A__ to an economic recovery.

A) crucial B) competitive

C) acute D) satisfactory

22. It would be wise to __B__ your property against storm damage.

A) ensure B) insure

C) integrate D) guarantee

23. The Main Street is the __C__ stop for this bus route.

A) end B) closing

C) terminal D) concluding

24. Over a third of the population was estimated to have no __D__ to the health service.

A) assessment B) assignment

C) exception D) access

25. Very few scientists __A__ completely new answers to the world’s problems.

A) come up with B) come out

C) come round D) come up to

26. After she qualified as a lawyer, she decided to specialize __B__ contract law.

A) on B) in

C) with D) of

27. A prime minister cannot expect to have much time to __A__ to purely personal matters.

A) devote B) reserve

C) concentrate D) spare

28. The whole idea __A__ from a casual remark.

A) evolved B) involved

C) generated D) adapted

29. There are not many teachers who are strong __C__ of traditional methods in English teaching.

A) sponsors B) contributors

C) advocates D) performers

30. No longer are contributions to computer technology confined to any one country: __D__ is this more true than in Europe.

A) hardly B) little

C) seldom D) nowhere

U05-B

1. It took him several months to __D__ the wild horse.

A) tend B) cultivate

C) breed D) tame

2. I don’t think it was an accident. He did it on _B___.

A) choice B) purpose

C) intention D) design

3. The manager __C__ the letter to his secretary, who wrote it down in short hand.

A) passed B) copied

C) dictated D) declared

4. He was of __A__ birth; his parents had no money and lived poorly.

A) humble B) harsh

C) wicked D) wrecked

5. On the way to school, there was no shelter from the rain, so the students were soaked __B__.

A) wet B) to the skin

C) on the skin D) over

6. The smoke from the burning building almost __C__ the firemen and forced them to wear masks.

A) blocked B) provoked

C) choked D) stroked

7. He smiled again with an air of __A__ contentm ent and said, “It’s the first time I’ve ever done what I wanted to do.”

A) supreme B) superficial

C) supplementary D) superior

8. We might say that __C__ has been done when a man’s innocence and guilt has been proved beyond doubt.

A) judgment B) jury

C) justice D) wrong

9. He has given all the facts at great __D__ so that you may judge for yourself.

A) detail B) extent

C) degree D) length

10. She hasn’t found an apartment yet; she’s staying wi th her aunt _C___.

A) for a long time B) for the first time

C) for the time being D) from time to time

11. On receiving sound waves, our eardrums __C__ and cause minute electrical signals to be sent to the brain.

A) shiver B) shake

C) vibrate D) tremble

12. Coal and petroleum are called __B__ substances, because they are the remains of living things.

A) superb B) organic

C) vigorous D) rotten

13. Preservatives (防腐剂) are added to bread to keep it from getting __D__.

A) static B) stained

C) stable D) stale

14. Here were cycles of industrial prosperity which always collapsed into industrial __C__.

A) booms B) nightmares

C) depressions D) disadvantages

15. All men or women, young or old, short or tall, should not __D__ any form of discrimination, because sooner or later we are all likely to fall victim to this dangerous practice.

A) resist B) sustain

C) undergo D) tolerate

16. Generally, it is only when animals are trapped that they __A__ to violence to escape.

A) resort B) appeal

C) proceed D) incline

17. In the end, a __B__ of six men and six women deliberated four days and found him guilty of murder.

A) panel B) jury

C) court D) legislation

18. Although his __A__ ideas were difficult to understand, I managed to go through the whole book.

A) abstract B) practical

C) concrete D) superficial

19. During a visit to the Forbidden City, she was heard to __D__ “it’s so beautiful” three times.

A) have grasped B) have gripped

C) have claimed D) have exclaimed

20. This meat is rather tough; you have to __A__ it for a long time.

A) chew B) bite

C) eat D) swallow

21. We cannot judge a person simply on the __B__ of his education.

A) condition B) basis

C) principle D) base

22. Don’t let the child play with scissors ___B___ he cuts himself.

A) only if B) in case

C) now that D) so that

23. I’d grown __D__ of the place and it was difficult to leave.

A) considerate B) accustomed

C) attached D) fond

24. He had no qualifications; __B__, he got the job.

A) but B) nevertheless

C) despite D) instead

25. Don’t forget to _C___ the letter bef ore you post it.

A) stick B) fasten

C) seal D) enclose

26. The child got a __D__ from his mother for being rude.

A) slip B) strap

C) snap D) slap

27. The bond of true affection had pulled us—six very different men from six very different countries—across Antarctica; we proved in the end that we weren’t very different __A__.

A) after all B) as usual

C) in particular D) for all

28. The couple separated because they were not __A__.

A) compatible B) equivalent

C) consistent D) uniform

29. He made several interesting discoveries when he __A__ a monkey recently.

A) experimented on B) tried on

C) experimented with D) tried with

30. Their specialities __C__ from Chinese literature, history and philosophy to law, sciences, and traditional Chinese medicine.

A) alter B) separate

C) range D) differ

U06-B

1. I said I would do it and I __C__ my promise.

A) stand up to B) stand for

C) stand by D) stand up for

2. Mr. Morgan can be very sad __C__, though in public he is extremely cheerful.

A) by oneself B) in person

C) in private D) as individual

3. Color-blind people often find it difficult to __B__ between blue and green.

A) separate B) distinguish

C) compare D) contrast

4. Keeping what belongs to another __D__ to stealing.

A) applies B) accounts

C) attaches D) amounts

5. The time taken on your journey, together with your __C__, will enable you to calculate how far you have travelled.

A) distance B) rate

C) speed D) motion

6. The newly-built Science Building seems __D__ enough to last a hundred years.

A) static B) sophisticated

C) steady D) substantial

7. Helen groups all people into two __B__: those she likes and those she dislikes.

A) specimens B) categories

C) catalogs D) sectors

8. Fry rejected the accepted __B__ of behavior and married one of his servants.

A) hint B) code

C) signal D) advice

9. We couldn’t see much because there was only a __D__ light in the room.

A) delicate B) disguised

C) depressed D) dim

10. The truck driver was proved __C__ of the crime.

A) indifferent B) independent

C) innocent D) inevitable

11. His argument does not suggest that mankind can __C__ to be wasteful in the utilization of these resources.

A) resort B) grant

C) afford D) entitle

12. He takes a 10% __D__ on all the sales he makes: if he sells goods worth $100 he gets $10.

A) portion B) proportion

C) concession D) commission

13. Putting in a new window will __B__ cutting away part of the roof.

A) include B) involve

C) contain D) comprise

14. The authorities __D__ tourists from visiting the secret factory.

A) banged B) bound

C) bonded D) banned

15. There are certain __B__ on which you must interrupt people who are in the middle of doing something.

A) conditions B) occasions

C) situations D) environments

16. We had to __C__ a lot of noise when the children were at home.

A) go in for B) hold on to

C) put up with D) keep pace with

17. The new regulation does not __D__ until the first of March.

A) take into effect B) get into effect

C) put into effect D) go into effect

18. After dinner, the two men __A__ into the study where they could talk freely.

A) retired B) restored

C) restrained D) resigned

19. Tom could not __B__ the last problem on the arithmetic test.

A) fill out B) figure out

C) find out D) filter out

20. Adam has a good position and will pay you back __C__.

A) lastly B) inevitably

C) eventually D) equally

21. The careless man received a ticket for speeding. He __B__ have driven so fast.

A) can’t B) shouldn’t

C) wouldn’t D) mustn’t

22. While crossing the mountain area, all the men carried guns lest they __A__ by wild animals.

A) should be attacked B) must be attacked

C) had been attacked D) would be attacked

23. Anna was reading a piece of science fiction, completely __D__ to the outside world.

A) having been lost B) losing

C) to be lost D) lost

24. They always give the vacant seats to __A__ comes first.

A) whoever B) who

C) whomever D) whom

25. He said that the driver must have had an accident; otherwise he __A__ by then.

A) would have arrived B) should arrive

C) must have arrived D) would arrive

26. Such crimes may be so complex that months or years go by before anyone __D__ them.

A) would have discovered B) discovered

C) will discover D) discovers

27. If I __B__ harder at school, I would be sitting in a comfortable office now.

A) worked B) had worked

C) were to work D) were working

28. __D__ much is known about what occurs during sleep, the precise function of sleep and its different stages remains largely in the realm of assumption.

A) Because B) Since

C) For D) While

29. Professor Wang, __C__ for his informative lectures, was warmly received by his students.

A) knowing B) to be known

C) known D) having known

30. It is high time that such practices __B__.

A) are ended B) were ended

C) be ended D) must be ended

U07-B

1. A friendship may be _C___, casual, situational or deep and lasting.

A) identical B) original

C) superficial D) critical

2. The weatherman broadcasts the __B__ in temperature twice a day.

A) adjustment B) variation

C) variety D) modification

3. The teacher told the students in her conversation class to __D__ their talk to the topic.

A) concern B) condense

C) concentrate D) confine

4. On turning the corner, we saw the road __A__ steeply.

A) descending B) departing

C) depressing D) decreasing

5. Many examples and extra grammatical information are among the special __D__ of this dictionary.

A) traits B) marks

C) marks D) features

6. When I __C__ her with the evidence, the girl admitted that she was wrong.

A) conveyed B) displayed

C) confronted D) consulted

7. Millions of peasants have __A__ to the cities.

A) migrated B) accelerated

C) illustrated D) integrated

8. They are trying to __D__ the waste discharged by the factory for profit.

A) expose B) exhibit

C) exhaust D) exploit

9. The police are __A__ the records of all those involved in the crime.

A) looking into B) looking out

C) looking after D) looking on

10. I suffered from mental______A____ because of stress from my work.

A) fatigue B) damage

C) relief D) release

11. The car salesman took the customer for a drive in the new model in order to __D__ its improved features.

A) advertise B) exhibit

C) reveal D) demonstrate

12. On the evening in __D__ he had been making all sorts of complicated calculations.

A) issue B) hand

C) concern D) question

13. Proper clothes _A___ for much in most professions, so the job applicant should take care to appear appropriately dressed in the interview.

A) count B) value

C) impress D) imply

14. She __B__ through the mist, trying to find the right path.

A) glanced B) peered

C) gazed D) scanned

15. To understand the __A__ of a situation, we have to know something about that kind of situation.

A) implications B) references

C) relations D) findings

16. The show was __B__ being a failure; it was a great success.

A) by far B) far from

C) far apart D) so far

17. That is our __C__ proposal, and no other changes will be considered.

A) thorough B) complete

C) ultimate D) extreme

18. The former mayor of the city was always holding a __D__ against new immigrants and made life difficult for them there.

A) priority B) discomfort

C) disadvantage D) prejudice

19. Soon the pilot was sent on a bombing __A__ over Germany.

A) mission B) performance

C) delivery D) tour

20. They have __D__ what I suspected long ago.

A) assured B) ensured

C) convinced D) confirmed

21. Investigators agreed that passengers on the airliner __C__ at the very moment of the crash.

A) should have died B) must be dying

C) must have died D) ought to die

22. The residents, __D__ had been damaged by the fire, were given help by the Red Cross.

A) all of their homes B) all their homes C) whose all homes D) all of whose homes

23. These people once had fame and fortune; now __A__ is left to them is utter poverty.

A) all that B) all what

C) all which D) that all

24. We left the meeting, there obviously __B__ no point in staying.

A) were B) being

C) to be D) having

25. The owner and editor of the newspaper __C__ the conference.

A) were attending B) were to attend

C) is to attend D) are to attend

26. Who would you rather __D__ with you, George or me?

A) going B) to go

C) have gone D) went

27. What a lo vely party! It’s worth __A__ all my life.

A) remembering B) to remember

C) to be remembered D) being remembered

28. Although a teenager, Fred could resist ___A___ what to do and what not to do.

A) being told B) telling

C) to be told D) to tell

29. There has been a great increase in retail sales, ___C___?

A) does there B) isn’t there

C) hasn’t there D) isn’t it

30. How is it ___D___ your roommate’s request and yours are identical?

A) if B) so

C) what D) that

大学英语考试试题

<大学英语语法>考查试题 一.选择正确答案填入相应的空格处:(70%) forest guards often find campfires thet have not been ______completely. down B. put out C. put away over 2..Of all the economically important plants, palms have been______. least studied the least less and less study the less is a continuous supply of fuel oil. things needed is needed is needed their need 4.The survey indicates that each Chinese family averaged_____of daily television usage in 1994than in 1993. many as 60 minutes B. 60 minutes more C. 60 minutes C. more 60 minutes 5.All evidence the court has collected boils_____to the fact that he is a spy. A. down B. off C. up D. overluggage, the group of tourists hurried to the airport.2009-2010学年第二学期() A. After packed packed packing was always nervous_____ in city traffic. driving B. driving driving driving 8. I saw Alan skimming over the water and, finally, ____ into it.

大学英语四级练习题单项选择题

大学英语四级练习题单项选择题-5 1.His proposal is __A_____ to all of us and you do not need to tell us mor e about it. A.apparent B.appearing C.approaching D.apart 2.This mountain range has many high __A_____ and fertile valleys. A.peaks B.hills C.phases D.pink 3.He gave us a good __C_____ of his experience. A.demonstration B.frequency C.descripton D.instruction 4.You have your choice of three __A_____ of ice cream. A.varieties B.tops C.respects D.decks 5.This sick man was __D_____ in a blanket. A. input B.issued C.ensured D.wrapped 6.This is the military ___B_____. Nobody is allowed to get in without per mission. A.bond B.zone C.butter D.zoo 7.Rock music usually ___B____ the young people in most countries. A.applies to B.appeals to C.amazes D.actress

最新大学英语四级匹配题+详解

长篇阅读——匹配题 Directions: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2. Passage 1 Paper —More than Meets the Eye A) We are surrounded by so much paper and card that it is easy to forget just how complex it is. There are many varieties and grades of paper materials, and whilst it is fairly easy to spot the varieties, it is far more difficult to spot the grades. B) It needs to be understood that most paper and card is manufactured for a specific purpose, so that whilst the corn-flake packet may look smart, it is clearly not something destined for the archives. It is made to look good, but only needs a limited life span. It is also much cheaper to manufacture than high grade card. C) Paper can be made from an almost endless variety of cellulose(纤维素化合物)-based material which will include many woods, cottons and grasses of which papyrus is an example and from where we get the word "paper". Many of these are very specialized, but the preponderance of paper making has been from soft wood and cotton or rags, with the bulk being wood-based. Paper from Wood D) In order to make wood into paper it needs to be broken down into fine strands. Firstly by powerful machinery and then boiled with strong alkalies(碱) such as caustic soda, until a fine pulp of cellulose fibers is produced. It is from this pulp that the final product is made, relying on the bonding together of the cellulose into layers. That, in a very small nutshell, is the essence of paper making from wood. However, the reality is rather more complicated. In order to give us our white paper and card, the makers will add bleach and other materials such as china clay and additional chemicals. E) A further problem with wood is that it contains a material that is not cellulose. Something called lignin. This is essential for the tree since it holds the cellulose fibres together, but if it is incorporated into the manufactured paper it presents archivists with a problem. Lignin eventually breaks down and releases acid products into the paper. This will weaken the bond between the cellulose fibers and the paper will become brittle and look rather brown and careworn. We have all seen this in old newspapers and cheap paperback books. It has been estimated that most paperback books will have a life of no greater than fifty years, not what we need for our archives. F) Since the lignin can be removed from the paper pulp during manufacture, the obvious question is "why is it left in the paper". The answer lies in the fact that lignin makes up a considerable part of the tree. By leaving the lignin in the pulp a papermaker can increase his paper yield from a tree to some 95%. Removing it means a yield of only 35%. It is clearly uneconomic to remove the lignin for many paper and card applications. It also means, of course, that lignin-free paper is going to be more expensive. G) However, it is nevertheless what the archivist must look for in his supplies. There is no point whatsoever in carefully placing our valuable artifacts in paper or card that is going to hasten their demise. Acid is particularly harmful to photographic materials, causing them to fade and in some cases simply vanish! H) So, how do we tell a piece of suitable paper or card from one that is unsuitable? You cannot do it by simply looking, and rather disappointingly, you cannot always rely on the label. "Acid-free" might be true inasmuch as a test on the paper may indicate that it is a neutral material at this time. But lignin can take years before it starts the inevitable process of breaking down, and in the right conditions it will speed up enormously. I) Added to this, as I have indicated earlier, paper may also contain other materials added during manufacture such as bleach, china clay, chemical whiteners and size. This looks like a bleak picture, and it would be but for the fact that there are suppliers who will guarantee the material that they sell. If you want to be absolutely sure that you are storing in, or printing on, the correct material then this is probably the only way. J) Incidentally, acids can migrate from material to material. Lining old shoe boxes with good quality acid-free paper will do little to guard the contents. The acid will get there in the end. Paper from Rag K) Paper is also commonly made from cotton and rag waste. This has the advantage of being lignin-free, but because there is much less cotton and rag than trees, it also tends to be much more expensive than wood pulp paper. You will still need to purchase from a reliable source though, since even rag paper and card can contain undesirable additives. L) A reliable source for quality rag papers is a recognized art stockiest. Many water color artists insist on using only

2010年12月大学英语四级听力真题的试题与答案

2010年12月大学英语四级听力真题的试题与答案, Section A 短对话(11~18) 11. M: Oh my god! The heat is simply unbearable here. I wish we’ve gone to the beach instead. W: Well, with the museums and restaurants in Washington I’ll be happy here no matter what the temperature. Q:What does the woman mean? 12. M: How’s the new job going? W: Well, I’m learning a lot of new things, but I wish the director would give me some feedback. Q:What does the woman want to know? 13. M: Can you help me work out a physical training program John? W: Sure, but whatever you do be careful not to overdo it. Last time I had two weeks’ worth of weight-lifting in three days and I hurt myself. Q: What does the man suggest the woman do? 14. M: I have an elderly mother and I’m worried about her going on a pl ane. Is there any risk? W: Not if her heart is all right. If she has a heart condition, I’d recommend against it. Q: What does the man want to know about his mother? 15. M: Why didn’t you stop when we first signaled you at the crossroads? W: Sorry, I was just a bit absent-minded. Anyway, do I have to pay a fine? Q: what do we learn from the conversation? 16. M: I’m no expert, but that noise in your refrigerator doesn’t sound right. Maybe you should have it fixed. W: You’re right. And I suppose I’ve put it off long enough. Q: What will the woman probably do? 17. M: I did extremely well on the sale of my downtown apartment. Now, I have enough money to buy that piece of land I’ve had my eye on and build a house on it. W: Congratulations!Does that mean you’ll be moving soon? Q: What do we learn about the man from the conversation?

(完整版)大学英语选择题61道及答案

1. The problem ________ when the students refused to do their homework. A. arose B. aroused C. rose D. raised 2. When he suddenly ________ up the subject of genetic engineering, there was an embarrassed silence. A. took B. brought C. showed D. came 3. ________ so many people in the United States been out of work as today. A. More than ever before B. In the past, there have never C. Never before have D. Formerly, there never were 4. It ________ as a shock to realize that I was not alone in the room. A. came B. appeared C. arrived D. reached 5. Since William had been seriously ill for several months, his parents were worried about ________ to return to school full-time. A. he wanted B. he wanting C. him to want D. his wanting 6. The association is ________ to raising funds to help the blind. A. conducted B. committed C. concentrated D. concerned 7. I won't ________ those children making a noise in my house! A. allow B. let C. have D. permit 8. The TV station, in ________ to massive popular demand, decided to continue the soap opera (肥皂剧). A. regard B. relation C. respect D. response

大学英语四级练习题单项选择题

大学英语四级练习题单项选择题- 5 1.Hisproposalis__A_____toallofusandyoudonotneedtotellusmoreaboutit. A.apparent B.appearing C.approaching D.apart 2.This mountain range has many high __A_____ and fertile valleys. A.peaks B.hills C.phases D.pink 3.He gave us a good __C_____ of his experience. A.demonstration B.frequency C.descripton D.instruction 4.You have your choice of three __A_____ of ice cream. A.varieties B.tops C.respects D.decks 5.This sick man was __D_____ in a blanket. A. input B.issued C.ensured D.wrapped 6.This is the military ___B_____. Nobody is allowed to get in without permission. A.bond B.zone C.butter D.zoo 7.Rock music usually ___B____ the young people in most countries. A.applies to B.appeals to C.amazes D.actress 8.Would he have seen you if you hadn’t __B_____ to him

大学英语四级匹配题详解

大学英语四级匹配题详 解 Pleasure Group Office【T985AB-B866SYT-B182C-BS682T-STT18】

长篇阅读——匹配题 Directions: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2. Passage 1 Paper — More than Meets the Eye A) We are surrounded by so much paper and card that it is easy to forget just how complex it is. There are many varieties and grades of paper materials, and it is fairly easy to spot the varieties, it is far more difficult to spot the grades. B) It needs to be understood that most paper and card is manufactured for a specific purpose, so that whilst the corn-flake packet may look smart, it is clearly not something destined for the archives. It is made to look good, but only needs a limited life span. It is also much cheaper to manufacture than high grade card. C) Paper can be made from an almost endless variety of cellulose(纤维素化合物)-based material which will include many woods, cottons and grasses of which is an example and from where we get the word "paper". Many of these are very specialized, but the of paper making has been from soft wood and cotton or , with the bulk being wood-based. Paper from Wood D) In order to make wood into paper it needs to be broken down into fine strands. Firstly by powerful and then boiled with strong alkalies(碱) such as caustic soda, until a fine of fibers is produced. It is from this pulp that the final product is made, relying on the bonding together of the cellulose into layers. That, in a very small nutshell, is the essence of paper making from wood. However, the reality is rather more complicated. In order to give us our white paper and card, the makers will add and other materials such as china clay and additional chemicals. E) A further problem with wood is that it contains a material that is not cellulose. Something called . This is essential for the tree since it holds the cellulose fibres together, but if it is incorporated into the manufactured paper it presents archivists with a problem. Lignin eventually breaks down and releases acid products into the paper. This will weaken the bond between the cellulose fibers and the paper will become brittle and look rather brown and careworn. We have all seen this in old newspapers and cheap paperback books. It has been estimated that most paperback books will have a life of no greater than fifty years, not what we need for our archives. F) Since the lignin can be removed from the paper pulp during manufacture, the obvious question is "why is it left in the paper". The answer lies in the fact that lignin makes up a considerable part of the tree. By leaving the lignin in the pulp a papermaker can increase his paper yield from a tree to some 95%. Removing it means a yield of only 35%. It is clearly uneconomic to remove the lignin for many paper and card applications. It also means, of course, that lignin-free paper is going to be more expensive. G) However, it is nevertheless what the must look for in his supplies. There is no point whatsoever in carefully placing our valuable artifacts in paper or card that is going to their . Acid is particularly harmful to photographic materials, causing them to fade and in some cases simply vanish! H) So, how do we tell a piece of suitable paper or card from one that is unsuitable You cannot do it by simply looking, and rather disappointingly, you cannot always rely on the label. "Acid-free" might be true inasmuch as a test on the paper may indicate that it is a neutral material at this time. But lignin can take years before it starts the inevitable process of breaking down, and in the right conditions it will speed up enormously. I) Added to this, as I have indicated earlier, paper may also contain other materials added during manufacture such as bleach, china clay, chemical whiteners and size. This looks like a bleak picture, and it would be but for the fact that there are suppliers who will

新视野大学英语选择题及答案

1.I'd like to take __________ of this opportunity to thank all of you for your efforts. A. profit B. benefit C. occasion D. advantage 2.In copying this paper, be careful not to leave __________ any words. A. out B. alone C. off D. behind 3.When doing the wash, it is important to _______ white and colored clothing. A. compare B. separate C. establish D. contrast 4.We finally __________ an agreement after a lot of hard argument. A. reached B. did C. arrived D. drove 5.It is desirable that the airplane ___________ as light as possible. A. is B. were C. be D. had been 6.We came finally __________ the conclusion that she had been telling lies all the time. A. of B. into C. to D. at 7.I am not used to speaking _________ public. A. in B. at C. on D. to 8.He didn't live up to __________ had been expected of him.

大学英语四级翻译练习题

2010年大学英语四级翻译练习题 1. The finding of this study failed to _________________________ (将人们的睡眠质量考虑在内). 2. The prevention and treatment of AIDS is _____________________________ (我们可以合作的领域). 3. Because of the leg injury, the athlete ___________________________ (决定退出比赛). 4. To make donations or for more information, please _____________________________ (按以下地址和我们联系). 5. Please come here at ten tomorrow morning _______________________________ (如果你方便的话). 1. The finding of this study failed to take people’s sl eep quality into account/consideration (将人们的睡眠质量考虑在内) (本题考查对take …into account/consideration的掌握。take …into account/consideration意为“把…考虑在内”,“人们的睡眠质量”用people’s sleep quality来表达。也可以用the quality of people’s sleep 来表示) 2. The prevention and treatment of AIDS is the field (where)we can cooperate/ the field in which we can cooperate (我们可以合作的领域) (本题考查对定语从句的掌握。“领域”是the field,“我们可以合作的”作the field的定语从句,引导词可以用where/ in which,where可以省略,) 3. Because of the leg injury, the athlete decided to quit the match (决定退出比赛) (本句话是在陈述一件已经发生的事情,应用一般过去时态,因此用decided,“退出比赛”用quit the match来表示) 4. To make donations or for more information, please contact us at the following address (按以下地址和我们联系) (该句的后半部分是由please祈使句,please后面应该跟原形动词。与某人联系一般用contact表达,介词at与其一起构成介宾短语,修饰contact) 5. Please come here at ten tomorrow morning if it is convenient for you/at your convenience (如果你方便的话) (本题主要考查if 引导的条件状语从句,“你方便的话”用it is convenient for you/at your convenience表示 1. Specialists in intercultural studies say that it is not easy to __________________________ (适应不同文化中的的生活). 2. Since my childhood I have found that __________________________ (没有什么比读书对我更有吸引力). 3. The victim ___________________________ (本来会有机会活下来)if he had been taken to hospital in time . 4. Some psychologists claim that people _____________________________ (出门在外时可能会感到孤独).

大学英语四级信息匹配练习题

大学英语四级信息匹配练习题一 Directions: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. 长篇阅读 Preparing for Computer Disasters A) Summary: When home office computers go down, many small businesses grind to a halt. Fortunately, taking steps to recover from disasters and minimize their effects is quite straightforward. B) Fires, power surges, and floods, they're all facts of life. We read about them in the morning paper and see them on the evening news. We sympathize with the victims and commiserate over their bad luck. We also shake our heads at the digital consequences—melted computers, system failures, destroyed data. Yet, somehow, many of us continue to live by that old mantra of denial: "It won't happen to me." Well, the truth is, at some point you'll probably have to deal with at least one disaster. That's just how it goes, and in most aspects of our lives we do something about it. We buy insurance. We stow away provisions. We even make disaster plans and run drills. But for some reason, computer disaster recovery is a blind spot for many of us. It shouldn't be. Home computers contain some of our

相关文档
最新文档