北京大学15秋《大学英语3》作业5答案文档格式.docx

1、B. B. hereC. C. whatD. D. thereD4.the former presidents supporters went out in streets to express their anger and dissatisfaction.A. A. A small amount ofB. B. A large number ofC. C. A little bit ofD. D. A great deal ofB5.To be honest, todays dinner was just so-so. It wasnt such a good one _ promised

2、 by the boss.A. A. thatB. B. whichC. C. asD. D. what6.So many people _ the meeting had to be put off.A. A. being absentB. B. to be absentC. C. were absentD. D. had been absent7.We often advise him not to drink more is good for his health.A. A. asB. B. thatC. C. thanD. D. but8.Did Charles vote in the

3、 last election?No, he wasnt .A. A. enough old thenB. B. then enough oldC. C. old then enoughD. D. old enough then9.By no means look down on those who are less lucky in life than we are.A. A. we shouldB. B. should weC. C. we should notD. D. should we not10.He didnt feel like that day so he stayed ind

4、oors reading.A. A. workingB. B. worksC. C. to workD. D. worked11.No sooner had we started on the road it began to rain.A. A. whenB. B. thanC. C. thenD. D. whenever12.He decided to go for a sailing holiday the fact that he was usually seasick （晕船）.A. A. because ofB. B. in spite ofC. C. in case ofD. D

5、. as a result of13.What you do in your spare time is your own _ . However it should not be harmful to others.A. A. businessB. B. purchaseC. C. bargainD. D. sale14.As a gardener, Jim has to water the flowers and the grass in the garden every morning.A. A. trimB. B. improveC. C. refineD. D. repair15.T

6、he firemen are still the small fires started by the plane crash.A. A. taking offB. B. setting asideC. C. getting along withD. D. putting out16.改错请在以下句子划线部分中，挑出错误的选项。The sun gives off light and warmth, that makes it possible for plants to grow.A. A. gives offC. C. itD. D. for17.Sand painting has also

7、 called dry or earth painting and is practiced byseveral American Indian artists.A. A. has also calledB. B. andC. C. is practicedD. D. several American Indian artists18.Humans, like many other animals, are warm-blooded with a fairly constantly body temperature.A. A. HumansB. B. likeC. C. withD. D. f

8、airly constantly19.Now that the stress of examinations and interviews are over, we can all relax for a while.A. A. Now thatB. B. areC. C. allD. D. relax20.The talleBst of the twins went to search for the missing jewels, the picture of which you saw in todays newspaper.A. A. tallestB. B. search forC.

9、 C. the picture ofD. D. which-21.请阅读以下文章，回答文章后的五个小题。每个小题只有一个最佳选项。The top of the world is a wonderland. In winter, the temperature often falls to -30F and the sun never rises. The ocean is surrounded by frozen ground. There are few people or trees, but to polar bears, the Arctic（北极）is home.Polar bear

10、s have thick fur, big paws and other features that make them well prepared for life in their tough environment. In fact, they need the Arctic sea ice for survival. But climate change is causing larger and larger areas of summer sea ice to melt （融化）. Experts say that if warming patterns continue, the

11、 Arctic could be free of summer sea ice by 2050. That may cause two-thirds of the worlds 20,000 polar bears to be gone by then too.Polar bears cant survive for long on land. Seals are their main source of food. The only place where polar bears can hunt seals is on the ice. （79） Although these bears

12、are strong swimmers, they are no match for lightning swift seals in the water. A polar bear has brilliantly clever strategies to overcome this disadvantage. In winter the bear waits motionless beside a seals breathing hole, which is a narrow tunnel through the ice. Often many hours pass before the s

13、eal comes up for air and the bear kills it with a powerful blow of its paw. In summer, the polar bears that live on land eat very little and wait for the sea ice to return.With the sea ice forming later in the year and melting earlier, polar bears do not have enough opportunity to hunt and eat. Less

14、 sea ice makes it harder for the bears to catch the seals. The bears must swim longer distances between ice packs（大片浮冰）, and they cant always make it. The ice is also getting thinner. These conditions can cause polar-bear cabs to become separated from their mothers, who provide them with food.Steven

15、 Amstrup is the chief scientist of Polar Bears International. The group aims to save the bears and their home. 1.Which is the best title for the passage?单选题A. A. Climate Change in the ArcticB. B. How to Protect the EnvironmentC. C. The Arctic Ts Home to Polar BearsD. D. Polar Bears in Danger2.Where

16、do polar bears usually hunt seals?A. A. On land.B. B. In open water.C. C. In openings in the sea ice.D. D. At the bottom of the sea.3.The word A. A. adultsB. B. babiesC. C. huntersD. D. enemies4.According to the passage, which of the following statements is TRUE?A. A. Starving polar bears are increa

17、singly coming into villages, where they may be killed either for food or safety.B. B. Polar bears can spend their entire lives on land if the sea ice melts completely.C. C. Two-thirds of the worlds polar bears may disappear by 2050 as global warming continues.D. D. The growing distance between ice p

18、acks is not a problem for polar bears, because they are excellent swimmers.5.Whats the mission of Polar Bears International?A. A. Saving energy.B. B. Conducting scientific research.C. C. Seeking international cooperation.D. D. Saving polar bears and their home.22.When were learning a foreign languag

19、e, making sense of what we hear is the first step toward fluency. It sounds obvious, but until recently, we didnt know much about how listening works. New research demonstrates that effective listening involves more than simply hearing the words that float past our ears. Rather, its an active proces

20、s of receiving information and making meaning. This kind of engaged listening is a skill thats as critical for learning a range of subjects at school and work as it is for learning to understand a foreign tongue.Studies of skilled language learners have identified specific listening strategies that

21、lead to superior comprehension. Last year, for example, University of Ottawa researcher Larry Vandergrift published his study of 106 undergraduates who were learning French as a second language. Half of the students were taught in a conventional fashion, listening to and practicingtexts spoken aloud

22、. The other half, possessing the same initial （最初的） skill level and taught by the same teacher, were given detailed instruction on how to listen. It mined out that the second group “significantly outperformed”（胜过） the first one on a test of comprehension.So what are these listening strategies? Skill

23、ed learners go into a listening class with a sense of what they want to get out of it. They set a goal for their listening and they generate predictions about what the speaker will say. Before the talking begins, they mentally review what they already know about the subject, and form an intention to

24、 “listen out for” whats important or relevant. Once they begin listening, these learners maintain their focus; if their attention wanders, they bring it back to the words being spoken. They dont allow themselves to be thrown off by confusing or unfamiliar details. Instead, they take note of what the

25、y dont understand and make inferences about what those things might mean, based on other clues available to them: their previous knowledge of the subject, the context （语境） of the talk, the identity of the speaker, and so on.1.What is the main idea of this passage?A. A. Effective listening means hear

26、ing the words that float past our ears.B. B. Developing your listening skills is the first step toward developing fluency.C. C. Skilled listeners use specific strategies to get the most out of what they hear.D. D. Listening is one of the most powerful tools we have to gain information.2.What does Va

27、ndergrifts research show?A. A. Learners who adopt specific listening strategies become better listeners.B. B. Learners taught in the traditional way are better at reinforcing what they learn.C. C. Learners are more confident if they make fewer mistakes.D. D. Learners who listen on a regular basis im

28、prove faster.3.Which of the following statements about Vandergrifts research is TRUE?A. A. The participants were postgraduates learning French as a second language.B. B. All the participants were taught using the conventional method, with the focus on listening strategies.C. C. The two groups were t

29、aught by different teachers.D. D. The participants were at the same initial skill level.4.The expression “thrown off” in the third paragraph is closest in meaning to“_”.A. A. infectedB. B. confusedC. C. ruinedD. D. informed5.According to the passage, which of the following strategies is NOT used by skilled learners? 单选题A. A. Review their prior k