2016年12月大学英语四级真题及完整答案(共两卷)

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1、 . . . 2016年12月大学英语四级真题（第一套）Part I Writing (30minutes)Directions:For this part, you are allowed 30 minutes to write an essay. Suppose you have two options upon graduation: one is to take a job in a company and the other to go to a graduate school. You are to make a choice between the two. Write an e

2、ssay to explain the reasons for your choice. You should write at least 120 words but no more than 180 words.Part II Listening Comprehension (25 minutes)Section ADirections: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both t

3、he news report 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 Answer Sheet 1 with a single line through the centre.Questions 1and 2 are based on the news repo

4、rt you have just the heard.1. A) It was going to be renovated. C) It was dangerous to live in. B) He could no longer pay the rent. D) He had sold it to the royal family.2. A) A storm. C) A forest fire.B) A strike. D) A Terrorist attack.Questions 3and 4 are based on the news report you have just hear

5、d.3. A) They lost contact with the emergency department.B) They were injured by suddenly falling rocks.C) They sent calls for help via a portable radio. D) They were trapped in an underground elevator.4. A) They provided the miner with food and water.B) They sent supplies to keep the miners warm.C)

6、They released the details of the accident.D) They tried hard to repair the accident.Question5 to7 are based on the news report you have just heard.5. A) Raise postage rates. C) Close some of its post offices.B) Improve its services. D) Redesign delivery routes.6. A) Closing offices on holidays. C) C

7、omputerizing mail sorting processes. B) Shortening business hours. D) Stopping mail delivery on Saturdays.7. A）A lot of controversy will ariseB) Taxpayers will be very pleasedC) Many people will begin to complainD) Many post office staff will lose their jobsSection BDirections:In this section,you wi

8、ll hear two long conversations.At the end of eachconversation,you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from four choice marked A),B),C) and D).Then mark the corresponding letter an Answe

9、r sheet1 with a single line though the centre. Question8 to 11 are based on the conversation you have just heard.8. A)He will lose part of his pay. C)He will be given a warning.B)He will go through retraining. D)He is go good terms with his workmates.9. A)He is an experienced press operator. C)He is

10、 always on time.B)He is trustworthy guy. D）He is go good terms with his workmates.10. A)She is a trade union representative. C)She is better at handing such matters. B)She is a senior manager of the shop. D)She is in charge of public relation.11. A)He is always trying to stir up trouble.B)He is skil

11、led and experienced.C)He is very close to the manager.D)He is always complaining about low wages.Question12 to 15 are based on the conversation you have just heard.12. A)Open. C)Selfish.B)Reserved. D)Friendly.13. A)They read a book. C)They stay quiet.B)They talk about the weather D)They chat with fe

12、llow passengers.14. A)She was unwilling to make friends with workmates.B)She was never invited to a colleagues home.C)She was eager to visit an English castle.D)She was always treated as a foreigner.15.A) House are much more quiet. C) They want a garden of their own. B) They want to have more space.

13、 D) Houses provide more privacy.Section CDirections:In this section,you will hear three 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 choice

14、s marked A),B),C) and D).Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 16 to 18 are based on the passage you have just heard.16.A) They will automatically be given hiring priority. B) They dont have to go through job interviews. C) They are like

15、ly to get much higher pay. D) They dont have much choice of jobs.17.A) Visit the school careers services. C) Look at school bulletin boards. B) Ask their professors for help. D) Go through campus newspapers.18. A) Providing students with information about the library.B) Helping students arrange appo

16、intments with librarians.C) Supervising study spaces to ensure a quiet atmosphere.D) Helping students find the books and journals they need.Questions 19 to 21 are based on the passage you have just heard.19. A) It tastes better. C) It is easier to grow. B) It may be sold at a higher price. D) It can

17、 better survive extreme weathers.20. A) It can grow in drier soil. C) It will replace green tea one day.B) It is immune to various diseases. D) It is healthier than green tea.21. A) It does not have a stable market. B) It has made tea farmers life easier. C) It does not bring the promised health ben

18、efits.D) It has been well received by many tea drinkers.Questions 22 to 25 are based on the passage you have just heard.22. A) They care more about environment. B) They decorate their homes themselves. C) They prefer unique objects of high quality. D) They need decorations to show their status.23. A

19、) They made great contributions to society. B) They could only try to create at night. C) They were proud of their creations. D) They focused on the quality of their products.24. A) Identify fake crafts. C) Design handicrafts themselves. B) Make wise choices. D) Learn the importance of creation.25.

20、A) To attract foreign investments. C) To arouse public interest in crafts. B) To preserve the traditional culture. D) To boost the local economy.Part III Reading Comprehension (40 minutes)Section ADirections:In this section, there is a passage with ten blanks. You are required to select one word for

21、 each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre.

22、 You may not use any of the words in the bank more than once.Many men and women have long bought into the idea that there are “male” and “female” brains, believing that explains just about every difference between the sexes. A new study（26）that belief, questioning whether brains really can be distin

23、guished by gender.In the study, Tel Aviv University researchers（27）for sex differences the entire human brain.And what did they find? Not much. Rather than offer evidence for（28）brains as “male” or “female,” research shows that brains fall into a wide range, with most people falling right in the mid

24、dle.Daphna Joel, who led the study, said her research found that while there are some gender-based（29）, many different types of brain cant always be distinguished by gender.While the “average” male and “average” female brains were（30）different, you couldnt tell it by looking at individual brain scan

25、s. Only a small（31）of people had “all-male” or “all-female” characteristics.Larry Cahill, an American neuroscientist (神经科学家),said the study is an important addition to a growing body of research questioning（32） beliefs about gender and brain function. But he cautioned against concluding from this st

26、udy that all brains are the same,（33）of gender.“Theres a mountain of evidence（34）the importance of sex influences at all levels of brain function,” he told The Seattle Times.If anything, he said, the study（35） that gender plays a very important role in the brain “even when we are not clear exactly h

27、ow.”A) abnormal B) applied C) briefly D) categorizing E) challenges F) figure G) percentage H) provingI) regardlessJ) searchedK) similaritiesL) slightlyM) suggestsN) tastesO) traditionalSection BDirections: In this section, you are going to read a passage with ten statements attached to it. Each sta

28、tement 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.Can Burglars Jam You

29、r Wireless Security System?AAny product that promises to protect your home deserves careful examination. So it isnt surprising that youll find plenty of strong opinions about the potential vulnerabilities of popular home-security systems.BThe most likely type of burglary (入室盗窃) by far is the unsophi

30、sticated crime of opportunity, usually involving a broken window or some forced entry. According to the FBI, crimes like these accounted roughly two-thirds of all household burglaries in the US in 2013.The wide majority of the rest were illegal, unforced entries that resulted from something like a w

31、indow being left open. The odds of a criminal using technical means to bypass a security system are so small that the FBI doesnt even track those statistics.COne of the main theoretical home-security concerns is whether or not a given system is vulnerable to being blocked from working altogether. Wi

32、th wired setups, the fear is that a burglar (入室盗贼) might be able to shut your system down simply by cutting the right cable. With a wireless setup, you stick battery-powered sensors up around your home that keep an eye on windows, doors, motion, and more. If they detect something wrong while the sys

33、tem is armed, theyll transmit a wireless alert signal to a base station that will then raise the alarm. That approach will eliminate most cord-cutting concernsbut what about their wireless equivalent, jamming? With the right device tuned to the right frequency, whats to stop a thief from jamming you

34、r setup and blocking that alert signal from ever reaching the base station?DJamming concerns are nothing new, and theyre not unique to security systems. Any device thats built to receive a wireless signal at a specific frequency can be overwhelmed by a stronger signal coming in on the same frequency

35、. For comparison, lets say you wanted to “jam” a conversation between two peopleall youd need to do is yell in the listeners ear.E Security devices are required to list the frequencies they broadcast onthat means that a potential thief can find what they need to know with minimal Googling. They will

36、, however, need so know what system theyre looking for. If you have a sign in your yard declaring what setup you use, thatd point them in the right direction, though at that point, were talking about a highly targeted, semi-sophisticated attack, and not the sort forced-entry attack that makes up the

37、 majority of burglaries. Its easier to find and acquire jamming equipment for some frequencies than it is for others.F Wireless security providers will often take steps to help combat the threat of jamming attacks. SimpliSafe, winner of our Editors Choice distinction, utilizes a special system thats

38、 capable of separating incidental RF interference from targeted jamming attacks. When the system thinks its being jammed, itll notify you via push alert(推送警报).From there, its up to you to sound the alarm manually.G SimpliSafe was singled out in one recent article on jamming, complete with a video sh

39、owing the entire system being effectively bypassed with handheld jamming equipment. After taking appropriate measures to contain the RF interference to our test lab, we tested the attack out for ourselves, and were able to verify that its possible with the right equipment. However, we also verified

40、that SimpliSafes anti-jamming system works. It caught us in the act, sent an alert to my smartphone, and also listed our RF interference on the systems event log. The team behind the article and video in question make no mention of the system, or whether or not in detected them.HWe like the unique n

41、ature of that software. It means that a thief likely wouldnt be able to Google how the system works, then figure out a way around it. Even if they could, SimpliSafe claims that its system is always evolving, and that it varies slightly from system to system, which means there wouldnt be a universal

42、magic formula for cracking it. Other systems also seem confident on the subject of jamming. The team at Frontpoint addresses the issue in a blog on its site, citing their own jam protection software and claiming that there arent any documented cases of successful jam attack since the company began o

43、ffering wireless security sensors in the 1980s.I Jamming attacks are absolutely possible. As said before, with the right equipment and the right know-how, its possible to jam any wireless transmission. But how probable is it that someone will successfully jam their way into your home and steal your

44、stuff?J Lets imagine that you live in a small home with a wireless security setup that offers a functional anti-jamming system. First, a thief is going to need to target your home, specifically. Then, hes going to need to know the technical details of your system and acquire the specific equipment n

45、ecessary for jamming your specific setup. Presumably, you keep your doors locked at night and while youre away. So the thief will still need to break in. That means defeating the lock somehow, or breaking a window. Hell need to be jamming you at this point, as a broken window or opened door would no

46、rmally release the alarm. So, too, would the motion detectors in your home, so the thief will need to continue jamming once hes inside and searching for things to steal. However, hell need to do so without tripping the anti-jamming system, the details of which he almost certainly does now have acces

47、s to.KAt the end of the day, these kinds of systems are primarily designed to protect against the sort of opportunistic smash-and-grab attack that makes up the majority of burglaries. Theyre also only a single layer in what should ideally be a many-sided approach to securing your home, one that incl

48、udes common sense things like sound locks and proper exterior lighting at night. No system is impenetrable, and none can promise to eliminate the worst case completely. Every one of them has vulnerabilities that a knowledgeable thief could theoretically exploit. A good system is one that keeps that

49、worst-case setting as improbable as possible while also offering strong protection in the event of a less-extraordinary attack.36. It is possible for burglars to make jamming attacks with the necessary equipment and skill.37. Interfering with a wireless security system is similar to interfering with

50、 a conversation.38. A burglar has to continuously jam the wireless security device to avoid triggering the alarm, both inside and outside the house.39. SimpliSafe provides devices that are able to distinguish incidental radio interference from targeted jamming attacks.40. Only a very small proportio

51、n of burglaries are committed by technical means.41. It is difficult to crack SimpliSafe as its system keeps changing.42. Wireless devices will transmit signals so as to activate the alarm once something wrong is detected.43. Different measures should be taken to protect ones home from burglary in a

52、ddition to the wireless security system.44. SimpliSafes device can send a warning to the house owners cellphone.45. Burglars can easily get a security devices frequency by Internet search.Section CDirections:There are 2 passages in this section. Each passage is followed by some questions or unfinish

53、ed 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 Answer Sheet 2 with a single line through the centre.Passage OneQuestions 46 to 50 are based on the following passage.As a person who writes about f

54、ood and drink for a living. I couldnt tell you the first thing about Bill Perry or whether the beers he sells are that great. But I can tell you that I like this guy. Thats because he plans to ban tipping in favor of paying his servers an actual living wage.I hate tipping.I hate it because its an ob

55、ligation disguised as an option. I hate it for the post-dinner math it requires of me. But mostly, I hate tipping because I believe I would be in a better place if pay decisions regarding employees were simply left up to their employers, as is the custom in virtually every other industry.Most of you

56、 probably think that you hate tipping, too. Research suggests otherwise. You actually love tipping! You like to feel that you have a voice in how much money your server makes. No matter how the math works out, you persistently view restaurants with voluntary tipping systems as being a better value,

57、which makes it extremely difficult for restaurants and bars to do away with the tipping system.One argument that you tend to hear a lot from the pro-tipping crowd seems logical enough: the service is better when waiters depend on tips, presumably because they see a benefit to successfully veiling th

58、eir contempt for you. Well, if this were true, we would all be slipping a few 100-dollar bills to our doctors on the way out their doors, too. But as it turns out, waiters see only a tiny bump in tips when they do an exceptional job compared to a passable one. Waiters, keen observers of humanity tha

59、t they are, are catching on to this; in one poll, a full 30% said they didnt believe the job they did had any impact on the tips they received.So come on, folks: get on board with ditching the outdated tip system. Pay a little more upfront for your beer or burger. Support Bill Perrys pub, and any ot

60、her bar or restaurant that doesnt ask you to do drunken math.46. What can we learn about Bill Perry from the passage?A) He runs a pub that serves excellent beer.B) He intends to get rid of the tipping practice.C) He gives his staff a considerable sum for tips.D) He lives comfortably without getting

61、any tips.47. What is the main reason why the author hates tipping?A) It sets a bad example for other industries.B) It adds to the burden of ordinary customers.C) It forces the customer to compensate the waiter.D) It poses a great challenge for customers to do math.48. Why do many people love tipping

62、 according to the author?A) They help improve the quality of the restaurants they dine in.B) They believe waiters deserve such rewards for good service.C) They want to preserve a wonderful tradition of the industry.D) They can have some say in how much their servers earn.49. What have some waiters c

63、ome to realize according to a survey?A) Service quality has little effect on tip size.B) It is in human mature to try to save on tips.C) Tips make it more difficult to please customers.D) Tips benefit the boss rather that the employees.50. What does the author argue for in the passage?A) Restaurants should calculate the tips for customers.B) Customers should pay more tips to help improve service.C) Waiters deserve better than just relying on tips for a living.D