第二节完形填空(共20小题,每小题1.5分,满分30分)

阅读下面短文,从短文后面各题所给的四个选项(A、B、C和D)中选出可以填入空白处的最

佳选项,并在答题卡上将该项涂黑。

With time flying, people become aged.Then many people even in their middle age often start to notice that their memory and mental clarity are not what they used to be.We suddenly can' t remember we put the keys just a moment ago, or an old friend' s name, or the name of an old band we used to love.As the brain , we refer to these occurrences as "senior moments." seemingly innocent, this loss of mental focus can potentially have a(n) effect on our social and well—being.

Neuroscientists,-experts who study the nervous system, are increasingly showing that there' s actually a lot that can be done.It out that the brain needs exercise in much the same way our muscles do, and the right mental can significantly improve our basic cognitive( 认知 ) .Thinking is basically a of making connections in the brain.To a certain ;extent, our ability to in making the connections that drive intelligence is inherited(继承) , be-cause these connections are made through effort and practice, scientists believe that intelligence can expand and wave mental effort.

Now, a new Web-based company has taken a step and developed the first "brain training program" designed to actually help people improve and their mental sharpness.

The Web-based program you to systematically improve your memory and attention skills.The program keeps a( n) of your progress and provides detailed feedback(反馈) your performance and improvement.Most importantly, it changes and improves the games you play to up the strengths you are developing—much like a( n ) exercise routine which requires you to increase resistance and vary your muscle use.

1.A.where B.when C.that D.why

2.A.improves B.fades C.recovers D.falls

3.A.If B.Unless C.Once D.While

4.A.irregular B.limited C.damaging D.positive

5.A.personal B.psychological C.mental D.physical

6.A.turns B.finds C.points D.figures

7.A.connection B.responses C.workouts D.associations

8.A.style B.functions C.circumstances D.atmosphere

9.A.steps B.condition C.consequences D.process

10.A.insist B.believe C.succeed D.fail

11.A.Therefore B.Moreover C.Otherwise D.However

12.A.according to B.regardless of C.apart from D.instead of

13.A.back B.further C.aside D.around

14.A.regain B.reflect C.review D.respond

15.A.suggests B.makes C.hurries D.allows

16.A.hold B.record C.order D.pace

17.A.to B.with C.for D.about

18.A.irregularly B.habitually C.constantly D.unusually

19.A.carry B.put C.build D.take

20.A.risky B.effective C.meaningless D.familiar

A

Though the Web is becoming increasingly popular, the TV never fails to attract people.Do you know which television network is the largest in America? It is not ABC, CBS, or Fox.Nor is it one of the cable net-works such as CNN, which carries only news and news stories.It is not ESPN, the all-sports cable net-work, or even MTV, which is famous for its music videos.Rather it is PBS, Public Broadcasting System, a non-profit public broadcasting TV service.PBS has 349 member television stations in the U.S.and some member stations by cable in Canada.

PBS only attracts a minority of all TV viewers, about 2 percent.The industry leader, NBC, however, attracts 11 percent of viewers.But the growth of public television in the past two decades has been dramatic.This is especially noteworthy (值科关注) when one considers that public television stations must often survive on very limited budgets, on viewers' donations, and on private foundations and some governmental funding.

The level of quality of PBS programs, whether in national and international news, entertainment, or education, is excellent.Almost a whole generation of children throughout the world is familiar with Sesame Street and the characters of The Muppet Show.PBS is especially well known for the quality of its many educational TV programs.Over 95 percent of all public television stations have tale-courses.These courses are accepted and supported by more than 1,800 colleges and universities throughout the US.Each year, over a quarter of a million students take courses this way.

1.According to this article, PBS received part of its funding from___.

A.the audience

B.public schools

C.advertising agencies

D.other television stations

2.What is PBS most famous for?

A.Cable services.

B.Generous donations.

C.Tele-courses.

D.Live news broadcasts.

3.Which of the following is TRUE about public television stations ?

A.The majority of their viewers are minority people.

B.Ninety-five percent of their programs are tele-courses.

C.They are shrinking in number because they make no profits.

D.Their courses are accepted by many universities in America.

4.Which of the following has the highest percentage of viewers?

A.ABC B.PBS

C.NBC D.Fox

C

People laugh and people cry.But it is thought that emotions such as anger, or joy, typically make Americans feel uncomfortable and embarrassed.The shedder of tears (落泪者) is likely to apologize, even when a great tragedy was the cause.The observer of tears is likely to do everything possible to put an end to the emotional tears.But judging from recent studies of crying behavior, both those responses to tears are often inappropriate and may even be counterproductive (适得其反).

Humans are the only animals clearly known to shed emotional tears.Since evolution has given rise to few purposeless physiological responses, it is logical to assume that crying has one or more functions that increase survival.

Although some observers have suggested that crying is a way to ask for assistance form others (as a crying baby might from its mother), the shedding of tears is hardly necessary to get help.Vo-cal (出声的) cries would have been quite enough, more likely than tears to gain attention.So, it appears that there must be something special about tears themselves.

Indeed, the new studies suggest that emotional tears may play a direct role in easing stress. University of Minnesota researchers who are studying the chemical composition of tears have recently separated two important chemicals from emotional tears.Both chemicals are found only in tears that are shed in response to emotion.Tears shed because of exposure to cut onion would contain no such substance.

Other researchers are looking into the usefulness of tears as a means of diagnosing human ills and monitoring drugs.At Tulane University's Teat Analysis Laboratory Dr.Peter Kastl and his colleagues report that they can use tears to detect drug abuse, to study the causes of "dry eye" syndrome (综合症)and the effects of eye surgery, and perhaps even to measure exposure to environmental pollutants.

1.What does the phrase "both those responses" in Paragraph 1 refer to ?

A.Crying out of sorrow and shedding tears for happiness.

B.The embarrassment and unpleasant feelings of the observers.

C.Linking illness with crying and finding the chemical composition of tears.

D.The tear shedder' s apology and the observer' s effort to stop the crying.

2.It is known from the first paragraph that____.

A.shedding tears gives unpleasant feelings to Americans

B.crying may often result in tragedy

C.crying usually wins sympathy from other people

D.one who sheds tears in public will be blamed

3.What does the author say about crying?

A.It is a pointless physiological response to the environment.

B.It must have a role to play in man' s survival.

C.It is meant to get attention and assistance.

D.It usually produces the desired effect.

4.From the passage we can infer that____.

A.it is unnatural for people to shed tears

B.we can reduce our stress by shedding tears

C.shedders of tears can' t get help by crying loudly

D.unlike animals, humans can shed tears for survival

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