21世纪大学英语第四册课后习题答案（全1至7单元）Unit one TEXT A II 1.He defines greatness as the lasting contribution which a person makes or has made to human civilization. 2.The example of Churchill shows the importance of persistence and dedication in achieving greatness. 3.Firstborns and only children tend to make good leaders in times of crisis, but middle- born children are better peacetime leaders. 4.A 20th century politician should be an effective public speaker and a social person. 5.Intelligence seems to be less important than other factors, such as the ability to communicate effectively. 6.The ability to overcome traditional ways of thinking is also crucial. 7.They simply don’t devote the amount of time required.form of motivation. 8.The study showed that enjoying one’s work is the best IV 1.chat 2.acknowledge 3.motivated 4.charcteristic 5.despite 6.influential 7.cited 8.obstacle 9.intrinsic 10.criteria 11.obsession 12.innate 13.contribution(s) 14.contemporary 15.submitted 16.morale V 1.left behind 2.rise 3.made history 4.were endowed with 5.put up with 6.going nowhere 7.ifocuses on 8.be built on 9.put in e up with 11.take charge 12.set...apart VI efficiency emergency fluency frequency proficiency tendency urgency sufficiency 1.fluency 2.proficiency 3.emergency 4.Efficiency 5.tendency 6.frequency VII — it's that they don't have good study habits. 1.For some students, it's not that they don't put in enough time — it's that they are brought up in different environments. 2.Children perform differently at school. It's not that they have different IQs — it's that their energy hasn't been channeled effectively. 3.The company is not very productive. It's not that its staff aren't talented — it's that I have to finish my paper tonight. 4.I'm really sorry. It's not that I don't want to go to the cinema with you— it's probably that you have too much stress from your work. 5.You have a stomachache. It's not that the food was bad VIII 1.President Wilson didn't try to bring the US back to economic and political isolation. Instead, he believed in international cooperation through an association of nations. puters don't teach students in groups. Instead, they can help them learn effectively according to their different needs. 3.We shouldn't focus on minor points. Instead, we should try to solve the problem of the greatest urgency at present. 4.He dosen't get anybody else to help him. Instead, he likes to attend to everything himself. 5.Teaching success shouldn't be measured by the scores the students receive on tests. Instead, it should be measured by whether the students have internalized the ability and desire to learn. IX BCBAD DCABA DABCA XI 1.Americans tend to define people by the jobs they have/do. Such characteristics as their family and educational backgrounds are considered less important. his resignation. 2.His uncompromising personality explains why he could no longer put up with his employer and eventually submitted 3.If you really want to learn English well, you must put in a lot of time and energy, or you'll go nowhere. The same can be said of other subje4.Some actors fame is built on their innate beauty, but despite his short stature, Dustin Hoffman rose above and it is his excellent acting that se him apart. 5.After he took charge, we discovered that there were striking differences between him and his predecessor. He had the drive and passion, came up with many new ideas, and focused his work on how to raise our morale. 6.Deng 6.Deng Xiaoping Xiaoping Xiaoping made made made history history history when when when he he he declared declared declared China's China's China's reform reform reform and and and opening-up opening-up opening-up policy. policy. policy. Despite Despite Despite tremendous tremendous tremendous obstacles, obstacles, obstacles, he he he made made made lasting lasting contributions to our country's modernization with his unrelenting efforts. 7.Why could someone with a genius IQ be left behind by a hardworking person with an average IQ? It has to be acknowledged that besides one IQ, many other factors have much to do with one's achievements. 8.This teacher is really remarkable in first motivating her students so she can really teach them something. It's not that she is talented, it's that sh focuses completely or drawing their full attention in class. unit two TEXT A II 1.He got no thanks for returning a wallet, though he deserved to. 2.He wants to show how much people need gratitude to keep up a spirit of kindness and cooperation. 3.She saved up for two years, went to Normandy in person, and gave her son's gold wristwatch to the woman. 4.He send a short recording expressing his appreciation of the author's thoughtfulness and sent it to the author. 5.A patient whose life was saved by a blood transfusion came back again and again to donate his blood anonymously so that more patients cou be saved. 6.He does it by citing W.H. Hudson's gratitude for his wife's day-to-day heroism. 7.Those people who do little things for us all year round. 8.It can make people take infinite pains with their work. 9.Gratitude is needed all the time and none of us can give too much of it. III 1.intention 2.sincere 3.glaring 4.sore 5.trace 6.render 4.denial 5.proof 9.tribute 7.conventional 11.generous 12.gratitude 13.slammed 14.agreeable IV 1.caught/took my fancy 2.a mistake on John's part 3.take for granted 4.think twice 5.saved up 6.referred to 7.boast about 8.took pains with 9.refrain from 10.something of 11.in one way or another 12.fed up V 1.altitude 2.aptitude 3.attitude 4.longitude 5.fortitude 6.mulitiude titude 8.solitude VI 1.coordination 2.coexist 3.co-workers 4.co-owners 5.co-authored 6.Cooperation 7.Coeducation 8.copilot VII 1.no sacrifice for the education of the young was too great 2.No price is too high to pay in order to save their lives 3.cannot be too careful in performing an experiment 4.They cannot praise him too much 5.can not be overemphasized 6.cannot be overestimated VIII BACDD BABCD BADCA X 1.He glared at John and was annoyed by his refusal to cooperate. 2.John's sincere speech shows his gratitude to the people who rendered him generous help when he was in difficulty. 3.He is something of a stamp collector. The fact that once he saved up for two years to buy a rare stamp is proof of it. fancy in one way or another. 4.The beauty of these roses could not be overstated. They took/caught all the visitors 5.At first he took it for granted that they should build more highways in this area. Then a careful calculation of the expenditure compelled him think twice before he made the final decision. 6.Each time he receives a gift from me, no matter how small, my friend Bill never fails to acknowledge it. 7.The journalist has decided to trace the young man referred to in the old couple's letter, which is a tribute to the young man's effort at improvi their living conditions. 8.Though he was fed up with the salesmen who knocked at his door and boasted about their products every day, he refrained from slamming th door in their face. unit 3 TEXT A II 1.He changed his perspective and observed people who did not have smallpox. 2.He wants to give a good example of lateral thinking. 3.He compares the human brain to a computer and the change of one's point of view to the reprogramming of the computer. 4.It is to fight it. 5.He calls it vertical thinking. 6.He used the technique of lateral thinking. 7.The key is to make a shift in emphasis instead of fighting the problem head-on. 8.They should change their point of view and regard themselves as their body's keeper. 9.Very often lateral thinking yields much better results than vertical thinking. 10.It is approaching the target from a sideways point of view instead of approaching it directly. III 1.tactic 2.utmost 3.structure 4.slack 5.significance 6.head-on 7.dead end 8.erased 9.framework 10.vertical;vertical 11.ceased 12.flaw 13.implies 14.affirmed IV 1.wound up being 3.take in 5.take over 2.pulling on 4.in effect 6.ended up teaching V 1.approach 2.fought 3.cure 4.pressured 5.focus 6.approach 7.program 8.experienced 9.switch 10.escape 11.fail 12.escaped VI assistant accountant servant dependant attendant contestant defendant consultant inhabitant occupant 1.attendant 2.servant 3.consultans 4.contestant 5.accountant 6.occupants 7.assistant 8.inhabitants 9.dependants 10.defendant VII 1.of use 2.of great importance 3.of great/critical/extreme significance 4.of little value 5.of marked benefit 6.of invaluable help VIII 1. should have told me at once2. 2.should have told me beforehand3. 3.should have left the company long ago 4. never should have happened 5. should have left thirty minutes ago 6. should have phoned IX CDBDA BBDBB CABDC XI 1.Tom was hung up on the problem but could do nothing about it until he learnt to solve it with different tactics. teral thinking has helped him to advance his new theory which had seemed to reach a dead end. 3.The framework of our latest construction plan has been affirmed by the local government. Whether it will be carried out on time is of tutmost significance to the development of this coastal city. 4.While trying to find a solution to the problem, Edward reached an impasse in his thinking, but later he changed his point of view and solvthe problem in an entirely unexpected fashion. 5.Many people believe that computer labs will eventually take over from the libraries and students who want to take in new knowledge will enup learning everything in the computer lab. 6.Yesterday his car crashed into a truck almost head-on. If he does not stop driving so carelessly, I am sure he will wind up in the emergenroom of a hospital. 7.There is a flaw in the structural design of the painting. Why don't you erase the vertical lines and simplify it a little bit? 8.John should have given up smoking a long time ago. After all, health is of the utmost importance to everybody. unit 4 TEXT A II 1.The IQs among the students were within the normal range. 2.The study showed that a teacher's positive view and high expectations of students convinces them that they are gifted and enables them to dbetter than average work. 3.She did not see this as evidence that the student was not bright or capable, but rather viewed it as one day抯poor performance, an exception to a normally good pattern of work. 4.It is hard to describe exactly, but her tone was assured and she did not express any negative qualities such as irony, putdowns and/or irritation. 5.This shows that positive expectation can be effective even on mice, who do not, of course, understand human language. beling means thinking of people in terms of the general prejudices which we have about their nationality, their race, or their gender, rather beling means thinking of people in terms of the general prejudices which we have about their nationality, their race, or their gender, rathethan thinking of them as individuals. bels define a broad, heterogenerous group too specifically. They are usually prejudicial, non-inclusive, and often racist or sexist. 8.This example shows how labeling can create a sense of guilt in a person who does not do what is expected, even when he follows his taleand is quite successful. IV 1.breed 2.accordingly 3.racial 4.homogeneous 5.inclusive 6.welfare 7.deceiving 8.irritation 9.variables 10.uncover 11.irony 12.verbal 13.readily 14.indifference 15.certainty;certainty 16.superior V 1.in terms of 2.due to 3.measures/lives up to 4.as often as not 5.consisted of 6.go through with 7.in reality 8.in part VI 1.unfolded 2.unpacked 3.undo 4.unbend 5.unfastende 6.unload 7.undressing 8.unlocked VII 1.transmit 2.transforming;transferring 3.transcribed 4.transplanting 5.transfer 6.transparent VIII 1.AS the example in the text makes clear 2.As i mentioned earlier / As(was) mentioned earlier 3.As is known all 4.as (is) agreed on in the contract 5.as had been originally planned IX 1.They would rather overwork themselves to make life better for our sake than spend their hard-earned money on themselves 2.would rather read a best-seller than chat with others 3.would rather confine yourself in the library than go out to meet and talk with local people 4.would rather give up my short-term interest than let it slip away 5.would rather not tell our parents what in our minds than sit down and communicate with them like friends X BDADB ACADA BBACB XII 1.Schools 1.Schools should should should avoid avoid avoid deciding deciding deciding who who who is is is superior superior superior only only only in in in terms terms terms of of of students' students' students' exam exam exam results results results and and and treating treating treating them them them accordingly. accordingly. accordingly. Instead, Instead, Instead, a a a good good educational system should enable every student to measure up to good standards as well-rounded people. 2.As often as not, when college students have questions after class, their teachers are not readily available except during office hours. This is du to teachers' busy academic research, rather than their indifference to the students. 3.This class consists of forty students, most of whom used to be labeled average in terms of English level. But as this teacher has never sho 3.This class consists of forty students, most of whom used to be labeled average in terms of English level. But as this teacher has never show any verbal impatience, the students have reacted positively to his teaching methods and lived up to his expectations. 4.Teaching 4.Teaching is is is becoming becoming becoming increasingly increasingly increasingly demanding demanding demanding in in in the the the United United United States, States, States, due due due in in in part part part to to the the diversity diversity diversity of of of students' students' students' racial racial racial background background background and and and the the complexity of educational technologies that require additional training. 5.The English are, as often as not, labeled conservative. Obviously this label is prejudiced. In reality, Britain is not very different from othe European countries in terms of national characteristics. The British are polite, neat, orderly and confident. 6.Some young people grow up with a strong desire for independence. They would rather try hard to go through life on their own than turn their parents for help with a sense of guilt. 7.Your friend treats you sincerely, so you should respond accordingly and mustn 抰 deceive him or talk about his setbacks with irony(ironically). 8.The neighbors' irritation/annoyance was due to the noise they made. However, because of reassurances that they would stop working at night, they went through with the decoration of this apartment. Unit 5 Ⅳ 1.emulated 2.requesting 3.succeeding 4.miniature 5.inevitable 6.sizable 7.practically 8.outraged 9.craving 10.maximum maximum 11.afflict s 12.ignorance 13.intense 14.intervals 15.correspondence Ⅴ 1. take change of 2. get hold of 3.who live of 4. smile upon/on 5.adjust to 6.reflect upon 7.in person 8.due to 9.alon10.picking up 11.checked out 12.stuck out Ⅵ 1.indoor 2.influx 3.inhaled 4.input 5.inqure 6.insights 7.immigrated 8.implanted 9.impressed 10.imperiled 11.imports 12.including Ⅶ. 1. you might as well tell me the whole story 2. I think we might as well buy this computer 3. I might as well be talking to be a brick 4. we might as well have stayed at home 5. I might as well sell the farm and try and find a happy life somewhere else Ⅷ 1. with 2.at 3.on/about 4.on 5.with Ⅸ 1. I ’m I’mI’m curious about anything you may mention 2. Some of us like this film curious about anything you may mention 2. Some of us like this film 3. No matter how old we are, we still can and should learn new things. 4. Jefferson would only accept other people’s people’s opinions after considering them carefully. opinions after considering them carefully. 5. Dr.Heines took care of every person in the village. 6. the government lawyers tried their best to stop A T & T from controlling the market. Ⅹ ACBDC ADBBA DCBBA .Ⅻ 1. As you can imagine, reading has opened a new world to me and changed forever the course of my life. 2.He had demonstrated an unusually intense interest in books since childhood. So fascinated with books was he that he never let a day pass with out doing some reading. 3.Every time he takes the subway to and from work, he has with him a book that he wants to read. That is the way he has read nearly a hun books in the past three years. 4.When he was in high school, he used to read deep/far into the night in his own room. Each time he heard the approaching footsteps of his m er, he would turn off the light and feigned sleep. But as soon as his mother passed, he would turn on the light and begin reading again. 5.There is hardly anything about China he's not curious about. And to satisfy his curiosity he has decided to go there in person to see as much he can. 6.I don't know/ I have little/no idea what made your son envy that pop singer and try to emulate him in everything. You might as well ask him person. 7. As soon as he checked out the book from the library, he thumbed through its pages by the corridor light. 8.I don't think anybody ever learned more in the countryside than I did. In fact, those three years in the countryside enabled me to study far int sively than I would have if I had attended some college. UNIT 6 Ⅳ. 1. survey 2.ignite 3.distrusts 4.thesis 5.standardized 6.fortune 7.interact 8.hard-earned 9.frustrated 11.handy 12.numerical 13.approved 14.controversial 15.abstract Ⅴ 1.in the face of 2.from birth 3.amounted to 4.one by one 5.held out for 6.give in to 7.early on 8.shy away from 9.substituted 1.in the face of 2.from birth 3.amounted to 4.one by one 5.held out for 6.give in to 7.early on 8.shy away from 9.substituted f Ⅵ 1.well-read 2.hard-pressed 3.ill-advised 4.ill-considered 5.well-advised 6.well-informed 7.hard-won 8.well-meant 9.hard-earned .ill-defined 11.far-fetched 12.well-timed Ⅶ 1.interrelated 2.interact 3.interchanged 4.interconnected 5.intermarried 6.interlinked 7.interlock 8. intercommunicated Ⅷ 1. When it comes to business 2. When it came to a choice between shame and death 3. When it came to things he did not know how to deal with 4. When it came to being on time 5. When it comes to politics 6. When it comes to fighting Ⅻ 1. He was disabled from birth, but he never felt frustrated, nor did he give in to any difficulty. 2. Tom had been holding out for a promotion. When the opportunity showed up, he grabbed it at once. 3. He distrusts all standardized tests and believes that there should be something better to substitute for them. 4. My thesis is that we should carry out a survey of these controversial issues one by one right now. 5. Betty is diligent and dependable. She never shies away from any difficulties. In short, she is the kind of student that we are all proud of. 6. It is ill-advised to keep the gas tank in your house for it ignites easily and may burn up all your hard-earned wealth in just a few minutes. 7.Doctor Smith's lecture amounts to saying that a child who displays high EQ early on in life will succeed eventually in the face of all kinds offficulties. 8.Since many marriages end in divorce in the United States, psychologists have suggested that couples in all families communicate with each oth er more often and solve their problems before it becomes too late. UNIT 7 Ⅳ 1.has outgrown 2.garbage 3.identify 4.optimist 5.fraction 6.be transferred 7.reach 8.agents 9.were installed 10.estate Ⅴ 1. passing (her) over 2.make his peace with 3. freeze (competitors) out of business 4.fell short of 5. in print 6.for free 7.put in 8.fill (reporters) in on 9. let off 10.taken aback by 11.was at a loss 12.get rid of Ⅵ 1. breakage 2.package 3.wreckage 4.shrinkage 5. assemblages 6.storage Ⅶ 1.betrayal 2.withdrawal 3.removal 4.revival 5.survival 6.approval Ⅷ 1. Little does he realize how important this meeting is. 2. On no account must we give up 5. Seldom has there been so much concern about 3. Never have I heard such nonsense 4. Hardly had he fallen asleep when the phone rang. pollution 6. Under no circumstances shall we cancel the game. 7. Nowhere did the First Lady make a greater impression than in Pairs. pollution 8. Not until he received her letter did he fully understand the depth of her feelings. Ⅸ BBDAD DDBCC ACBAC Ⅺ 1. As I grew up, I made my peace with the fact that I would never fulfil my dream of becoming a writer. 2. Michael had got stuck trying to figure out the word essential to the word puzzle for two days before he threw up his hands in frustration. 3. The singer was taken aback by the pirated editions of his songs on the market, and he vowed not to let the thiefs off. 4. Thank you for purchasing our furnace. In return we will get rid of your old one for free. 5.Susan and I filled each other in on what had happened after we parted, from which I learned that she had had several children's books in prin6. Her bookstore having been frozen out by a giant chain, the middle-aged Lillian was at a loss as to what else she could do. 7.You need somebody to urge you constantly to see the task through to completion. 8. For fear that a new shopping center would ruin the peace of the community, many residents opposed the construction plan. 。
