2011年12月大学英语四级全真预测试题四及答案解析

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2011年12月大学英语四级全真预测试题四及答案解析

2011年12月大学英语四级全真预测试题四及答案解析

一、选词填空题

第1题：

It seems you always forget—your reading glasses when you are rushing to work, your coat when you are going to the cleaners, your credit card when you are shopping...

Such absent-mindedness may be 1 to you; now British and German scientists are developing memory glasses that record everything the2 sees.

The glasses can play back memories later to help the wearer remember things they have forgotten such as where they left their keys. And the glasses also 3 the user to "label" items so that information can be used later on. The wearer could walk around an office or a factory identifying certain 4 by pointing at them. Objects indicated are then given a 5 label on a screen inside the glasses that the user then fills in.

It could be used in 6 plants by mechanics looking to identify machine parts or by electricians wiring a 7 device.

A spokesman for the project said: "A car mechanic for8 could find at a glance where a part on a certain car model is so that it can be identified and repaired. For the motorist the system could 9 accident black spots or dangers on the road."

In other cases the glasses could be worn by people going on a guided tour, 10 points of interest or by people looking at panoramas where all the sites could be identified.

[A] allow

[B] instance

[C] blank

[D] industrial

[E] frustrating

[F] items

[G] indicating

[H] highlight [I] user

[J] complicated

[K] white

[L] annoying

[M] successful

[N] articles

[O] simple

【参考答案】：

略

二、阅读理解

第2题：

What makes Americans spend nearly half their food dollars on meals away from home? The answers lie in the way Americans live today. During the first few decades of the twentieth century, canned and other convenience foods freed the family cook from full-time duty at the kitchen range.

Then, in the 1940s, work in the wartime defense plants took more women out of the home that ever before, setting the pattern of the working wife and mother. Unless family members pitch in with food preparation, women are not fully liberated from that chore.

It's easier to pick up a bucket of fried chicken on the way home from work or take the family out for pizzas or burgers than to start opening cans or heating up frozen dinners after a long, hard day. Also nowadays, the rising divorce rate means that there are more single working parents with children to feed. And many young adults and elderly people, as well as unmarried and divorced mature people, live alone rather than as a part of a family unit and don't want to bother cooking for one. Fast food is appealing because it is fast, it doesn't require any dressing up, it offers a "fun" break in the daily routine, and the outlay of money seems small. It can be eaten in the car-sometimes picked up at a drive-in window without even getting out-or on the run. Even if it is brought home to eat, there will never be any dirty dishes to wash because of the handy disposable wrappings. Children, especially, love fast food because it's finger food, no struggling with knives and forks, no annoying instructions from adults about table manners.

1. Americans enjoy fast food mainly because ________.

[A] it can be eaten in the car

[B] it is much more tasty than home-made food

[C] one only uses his fingers while eating it

[D] it is time-saving and convenient

2. It can be inferred that children ________.

[A] want to have freedom at table

[B] wash dishes after each meal

[C] are not good at using forks and knives while eating

[D] take eating time as a fun break

3. Many Americans are eating out and not cooking at home nowadays because ________.

[A] they want to make a change after eating the same food for years at home

[B] the food made outside home tastes better than food cooked at home

[C] many of them live alone or don't like taking trouble to cook

[D] American women refuse to cook at home due to women's liberation movement

4. According to the text, a drive-in window is a ________.

[A] car window from which you can see the driver

[B] window in the restaurant from which you get your meal in the car

[C] place where you check the mechanic condition of your car

[D] entrance where you return the used plates after eating

5. The expression "pitch in with" (Line 2, Para. 2) probably means________.

[A] complain

[B] enjoy

[C] help

[D] deny

1小题>、【正确答案】：D

2小题>、【正确答案】：C

3小题>、【正确答案】：C

4小题>、【正确答案】：B

5小题>、【正确答案】：C

【参考解析】：无

第3题：

InfraGard is a grass-roots effort to respond to the need for cooperation and collaboration in countering the threat of cyber crime and terrorism to private businesses and the government. By the end of September, there will be InfraGard chapters in all 50 states, Calloway said. With advice from the FBI, each local chapter will be run by a board of directors that includes members of private industry, the academic community and public agencies. Bands, utilities, and other businesses and government agencies will use a secure Web site to share information about attempts to hack into their computer networks. Members can join the system free. A key feature of the system is a two-pronged method of reporting attacks.

A "sanitized" description of a hacking attempt or other incident-one that doesn't reveal the name or information about the victim-can be shared with the other members to spot trends. Then a more detailed description also can be sent to the FBI's computer crimes unit to interfere if there are grounds for an investigation. Cyber crime has jumped in recent years across the nation, particularly in hotbeds of financial commerce and technology like Charlotte. "Ten years ago, all you needed to protect yourself was a safe, a fence and security officers," said Chris Swecker, who is in charge of the FBI's Charlotte office. "Now any business with a modem is subject to attack." FBI agents investigate computer hacking that disrupted popular Web sites including Amazon. com, CNN and Yahoo!

several North Carolina victims have been identified this year. The investigation has also identified computer systems in North Carolina used by hackers to commit such attacks. Prosecutions of hackers have been hampered by the reluctance of companies to report security intrusions for fear of bad publicity and lost business. Meanwhile, too many corporations have made it too easy for criminals by sacrificing security for speed and accessibility. Jack Wiles, who will lead the local InfraGard chapter's board, said a recent report estimated 97 percent of all cyber crime goes undetected. Wiles, a computer security expert, has a firewall on his personal computer to prevent hackers from getting into his files. "I get at least one report a day that somebody was trying to get into my computer," he said, "the Net is a wonderful place, but it's also a dangerous one."

1. From the first paragraph, we know ________.

[A] InfraGard is a protective measure against cyber crime

[B] InfraGard is a measure of cooperation and collaboration

[C] there will be 50 InfraGard chapters in all states

[D] private business and the government are now committing cyber crime

2. Each local chapter of InfraGard will be run by the following EXCEPT ________.

[A] academic communities

[B] public agencies

[C] FBI

[D] private industry

3. By saying "too many corporations...speed and accessibility" (Lines 3～4, Para. 3), the author means ________.

[A] too many corporations take no notice of the security problem of computers

[B] criminals are sacrificing security for speed and accessibility

[C] it's very easy to sacrifice security for speed and accessibility

[D] many companies suffer from computer hacking because they value speed and accessibility more than security

4. All the following are reasons for the rise in cyber crime EXCEPT ________.

[A] victims won't report intrusions by hackers

[B] victims have no firewalls

[C] the use of modem is increasing

[D] companies don't pay enough attention to security

5. It can be concluded from the passage that ________.

[A] not all hacking attempts are worthy of investigation

[B] information of the victims is inaccessible

[C] InfraGard chapters will be in effect by the end of September

[D] https://www.360docs.net/doc/4d13702184.html, was often disrupted by hacking

1小题>、【正确答案】：C

2小题>、【正确答案】：C

3小题>、【正确答案】：D

4小题>、【正确答案】：B

5小题>、【正确答案】：A

【参考解析】：无

三、完型填空

第4题：

Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel1 the coast. Even in the twentieth century, goods can be moved more cheaply by boat than by any other2 of transport. These 3 make it possible for boats to travel 4 ports along the coast without being 5 to the dangers of the open. Some canals, such as the Suez and the Panama, save ships weeks of time by making their6 a thousand miles shorter. Other canals permit boats to reach cities that are not 7 on the coast; still other canals8 lands where there is too much water, help to 9 fields where there is not enough water, and 10 water power for factories and mills. The size of a canal11 on the kind of boats going through it. The canal must be wide enough to permit two of the largest boats using it to 12 each other easily. It must be deep enough to leave about two feet of water13 the keel of the largest boat using the canal. When the planet Mars was first 14 through a telescope, people saw that the round disk of the planet was crises-crossed by a15 of strange blue-green lines. These were called "canals"16 they looked the same as canals on earth 17 are viewed from an airplane. However, scientists are now 18 that the Martian phenomena are really not canals. The photographs 19 from space-ships have helped us to 20 the

truth about the Martian "canals".

1. [A] off [B] with [C] to [D] by

2. [A] way [B] means [C] method [D] approach

3. [A] waterways [B] waterfronts [C] channels [D] paths

4. [A] among [B] between [C] in [D] to

5. [A] revealed [B] exposed [C] opened [D] shown

6. [A] trip [B] journey [C] voyage [D] route

7. [A] lain [B] stationed [C] set [D] located

8. [A] escape [B] drain [C] dry [D] leak

9. [A] water [B] wet [C] soak [D] irrigate

10. [A] furnish [B] afford [C] offer [D] give

11. [A] focuses [B] bases [C] depends [D] takes

12. [A] cross [B] pass [C] move [D] advance

13. [A] down [B] beneath [C] below [D] off

14. [A] studied [B] researched [C] surveyed [D] observed

15. [A] plenty [B] number [C] deal [D] supply

16. [A] although [B] because [C] so [D] if

17. [A] that [B] where [C] when [D] as

18. [A] exact [B] definite [C] certain [D] decisive

19. [A] held [B] taken [C] got [D] developed

20. [A] find [B] expose [C] uncover [D] discover

1小题>、【正确答案】：C

2小题>、【正确答案】：B

3小题>、【正确答案】：A

4小题>、【正确答案】：B

5小题>、【正确答案】：B

6小题>、【正确答案】：C

7小题>、【正确答案】：D

8小题>、【正确答案】：B

9小题>、【正确答案】：D

10小题>、【正确答案】：A

11小题>、【正确答案】：C

12小题>、【正确答案】：B

13小题>、【正确答案】：C

14小题>、【正确答案】：D

15小题>、【正确答案】：B

16小题>、【正确答案】：B

17小题>、【正确答案】：A

18小题>、【正确答案】：C

19小题>、【正确答案】：B

20小题>、【正确答案】：D

【参考解析】：无

四、阅读理解

第5题：

Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, mark

Y (for YES) if the statement agrees with the information given in the passage;

N (for NO) if the statement contradicts the information given in the passage;

NG (for NOT GIVEN) if the information is not given in the passage.

For questions 8-10, complete the sentences with the information given in the passage.

To Save Trees, Fighting One Alien Insect with Others

Rusty rhea sighs wistfully as he talks about the beauty and peace of standing amid a grove (小树林) of deep green hemlocks in Appalachia, some of them up to 160 feet (50 meters) tall and more than 500 years old.

"This is a very special tree," said Rhea, an entomologist for the U.S. Forest Service's Forest Health Protection program in Asheville, North Carolina, "I was brought up here, and I don't want to see another species go by the wayside."

The evergreen trees, a hallmark of southern Appalachia's national parks, are under attack by an invasive inse4ct barely visible to the eye but potent enough to fell the giants of the eastern United States' old-growth forests.

Already the tiny bug from Japan, known as the hemlock woolly adelgid (HWA), has killed upward of 95 percent of the hemlocks in Virginia's Shenandoah National Park. Now they are making their way through the half-million-plus-acre (200,000-plus-hectare) Great Smoky Mountains National Park in North Carolina and Tennessee.

The hemlocks shade streams, keeping water temperatures just right for brook trout (鲑鱼) and other fish. They also house birds such as the black-throated green warbler, solitary vireo, and northern goshawk, all three of which mainly shelter in stands of hemlock trees.

Because of the insect's broad impact on the entire ecosystem of southern Appalachia, HW A stands to cause wider damage than the American chestnut blight (枯萎病)of the early 1900s. That fungus from Europe killed off the once dominant chestnut trees from the northeast United States to the southern Appalachian Mountains.

In addition, a species related to HWA, the balsam woolly adelgid, has already killed about 90 percent of the mature Fraser fir trees in the Smokies.

Acting Quickly

HW A arrived in the U.S. Pacific Northwest via nursery plants from Japan in 1924. By 1951 the tiny invader had been found in Virginia. Since then the insect has spread to more than 15 U.S. states.

The key to killing the HW A is to catch it early and act quickly. It's already well established in the Great Smoky Mountains, where Rhea and others are trying to stem the spread of the bugs.

HW A multiply quickly: All of the insects are females that reproduce asexually (无性地), laying several hundred eggs a year. When they get to the nymph, or crawler, stage, they are dormant from about June until October, after which they emerge and establish themselves on trees.

Winds and birds and other animals spread the crawlers through the forest.

HW A crawlers feed on the new growth of hemlocks by piercing the twigs that hold the

branches, sucking the sap, and injecting toxic saliva. The needles turn from a deep green to a grayish green and eventually die, depriving the tree of nutrition from photosynthesis.

An infected tree usually dies within five years of initial attack. Infection is signaled by either a white, cottonlike material that appears along a tree's twigs or by the "baldness" of a tree's upper branches.

Plans of Attack

In the Pacific Northwest the hemlocks seem to be tolerant of the creatures' feeding, and in the cold northeast, winters seem to keep them at bay. But in the warm southeast, with weather approximating that of the insects' native Asian homes, they thrive.

Chemical sprays-such as insecticidal soaps and horticultural oils as well as trunk or soil injections-have helped to kill some of the HW A infestations.

But spraying must be repeated every six months, and injections are expensive and last only two years at most. These methods can't be used conveniently or safely in remote areas or near the streams where hemlocks grow thickly.

Long term, the best way to control the pests appears to be releasing other insects that feed exclusively on HW A. Scientists have studied HWA in Japan and China and identified three such species. One of them, the Sasajiscymnus tsugae (St) beetle, was released in areas of Great Smoky Mountains National Park in 2002.

Studying what controls a species in its native habitat-including climate, predators, and host resistance-provided clues about which insects to use against HWA, said Kristine Johnson. Based in Gatlinburg, Tennessee, Johnson is a supervisory forester for Great Smoky Mountains National Park.

"Biological control is the only long-term hope to save the trees in the backcountry (穷乡僻壤)," she said. "We have 800 square miles (2,100 square kilometers) of contiguous wilderness. We value the native forest, and it's entirely worth defending."

Risky Business

Releasing one species of non-native bug to kill another could be risky business, potentially creating another type of infestation. But scientists first quarantined and studied the HW A-killer insects.

They believe the St beetles are the best answer to the HW A problem and that they won't cause side damage. This tiny black female beetle, the size of a poppy seed, is already spreading in the Great Smoky Mountains.

But the beetle and other HW A-killer insects are seasonal, so it will take several different ones operating year-round to keep HWA in check, Rhea said. He doesn't believe HW A will be completely eradicated (根除) but will instead be kept in balance by the predator insects. "We're trying to insert a balance in a system that's out of balance," he said.

Each St beetle can lay 200 to 300 eggs, said Ernest Bernard, professor of entomology at the University of Tennessee in Knoxville.

Bernard's laboratory is one of several that are breeding the beetles.

"Each beetle eats hundreds of baby adelgids a year," he said. And about 120,000 of the beetles have been released in the past couple years in the Smokies, but it is still too early to measure their impact.

One good sign, Bernard said, is that some beetle larvae (幼虫) have been found in areas where they were not released, indicating that the HW A killers may be reproducing and spreading.

1. The passage gives a general description of an invasive insect, HWA.

2. Hemlock is a hallmark of southern Appalachia's national parks.

3. The invasive insect, known as the hemlock woolly adelgid (HWA), is from Japan.

4. The key to killing the HW A is to catch it early and act quickly.

5. An infected tree usually dies immediately.

6. The Hemlock in the U.S. will be saved from HWA soon.

7. The long term, best way to control the pests HW A is spraying.

8. Since 1951 the HW A has spread to more than________.

9. Releasing one species of non-native bug to kill another could create________.

10. It will take several different insects operating year-round to________.

1小题>【参考答案】：

Y

2小题>【参考答案】：

Y

3小题>【参考答案】：

N

4小题>【参考答案】：

N

5小题>【参考答案】：

Y

6小题>【参考答案】：

Y

7小题>【参考答案】：

NG

8小题>【参考答案】：

15 U.S. states

9小题>【参考答案】：

another type of infestation

10小题>【参考答案】：

keep HWA in check

第6题：

It is time the whole society began to take action to ________________________(使我们的环境免于毁灭).

【参考答案】：

save our environment from destruction

第7题：

If we had set out earlier, ________________________(我们就不会在雨中行走).

【参考答案】：

we wouldn’t have walked in the rain

第8题：

When this semester is over, ________________________ (我就能抽空读这部小说了).

【参考答案】：

I should be able to get around to reading this novel

第9题：

________________________ (在我设计出这个问题的解决方案后)，I’ll submit a report to the committee.

【参考答案】：

After I work out a solution to the problem

第10题：

________________________ (我已得出结论)that it would be unwise to accept his proposal.

【参考答案】：

I have come to the conclusion

第11题：

Directions: For this part, you are allowed 30 minutes to write a composition on the topic: Online Education. You should write at least 120 words following the outline given below in Chinese:

1. 目前网络教育形成热潮

2. 我认为形成这股热潮的原因是……

3. 我对网络教育的评价

Online Education

【参考答案】：

Online Education

Being online is no longer something strange in our life.

To some degree, it has become part of our daily life. We can do a lot of things online, such as searching for information and communicating with friends far and near. But recently another helpful online activity has become very "in". That is online education.

Why could online education be so popular within such a short period of time? Among all the reasons, the quick development of the internet should be the essential one, which makes our dreams of attending class in the distance possible. Another underlying reason is the quick development of both society and technology. Today, modern science and technology are developing at lightening speed. To catch up with the development we all feel an urgent and strong desire to study. However, due to the great pace of modern society, many people are too busy to study full time at school. Online education just comes to their aid.

Personally, I appreciate this new form of education. It’s indeed a helpful complement to the traditional education system. It can provide different learners with more flexible and versatile ways of learning. Most of all, with online education, we can absorb the latest knowledge while working.