大学英语专四考试完形填空密训试题

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Researchers have established that when people are mentally ____1____, biochemical changes occur in the brain that allow it to ____2____ more effectively in cognitive (认知的) areas such as attention and memory. This is true ____3____ age.

People will be alert and ____4____ if they are faced with information that ____5____ them to think about things they are ____6____ in. And someone with a history of doing more ____7____ less will go into old age more cognitively sound than someone who has not had an active ____8____.

Many experts are so convinced ____9____ the benefits of challenging the brain that they are ____10____ the theory to work in their own lives. “The idea is not ____11____ to learn to memorize enormous ____12____ of information,” says James Fozard, associate director of the National Institute on Aging. “Most of us don’t need that kind of skill. Such specifi c training is____13____ less interest than being able to maintain mental ____14____.” Fozard and others say they challenge their brains with different mental skills, ____15____ because they enjoy them and because they are sure that their range of activities will help the ____16____ their brains work.

Gene Cohen, acting director of the same institute, says that we are frequently advised to keep ____17____ active as we age, but older people need to keep mentally active as well. Those who ____18____ are more ____19____ to maintain their intellectual abilities and to be generally happier and better adjusted. And intellectual activity actually ____20____ brain-cell health and size.

1. A. strengthened B. alert C. engaged D. activated

2.A. act B. think C. learn D. respond

3.A. as to B. regardless of C. in spite of D. despite

4.A. deceptive B. inceptive C. perceptive D. receptive

5.A. makes B. lets C. pushes D. gets

6.A. familiar B. interested C. Impressed D. attracted

7.A. rather than B. other than C. instead of D. in place of

8.A. brain B. mind C. intellect D. mentality

9.A. with B. at C. of D. in

10. A. putting B. trying C. using D. laying

11. A. certainly B. necessarily C. immediately D. quickly

12. A. number B. numbers C. amount D. amounts

13. A. of B. in C. with D. at

14. A. function B. alertness C. activity D. shape

15. A. both B. not C. and D. which

16. A. style B. effect C. efficiency D. way

17. A. bodily B. physically C. spiritually D. intellectually

18. A. do B. act C. work D. laugh

19. A. possible B. able C. likely D. often

20. A. affects B. influences C. reflects D. changes

　　文章大意

本文主要介绍研究人员所证实的一个观点 ：当人们动脑筋时 ，大脑 中会产生生物化学变化 ，这种变化在人们 的认知方面体现得更为明显 。另外，当人们遇到自己感兴趣的内容时 ，大脑会保持清醒状态 ;同时 ，经常动脑筋对年老之后 的脑健康是非常有益的。

　　答案与解析

1. C

语义衔接题 。mentally engaged ：动脑筋 ，思考问题 。与第二段 “k about things they are interested in”的think about相对应 。

2. A

语义衔接题 。think和respond在意义上无法与effectively搭配。本句的意思是研究者证实 ，当人们处于思考状态时 ，大脑 中产生 的生物化学变化会使得大脑在诸如注意力和记忆力等认知领域的活动更为有效 。

3. B

逻辑关系题 。regardless of ：不管 ，不顾 ，在此表示与年龄无关 ;despite, in spite of 意为“尽管”;as to ：至于。

4. D

形容词辨析题 。receptive ：善于接受 (新思想 )的 ;deceptive ：欺骗的;

inceptive ：期初的;perceptive ：感知的。

5. D

动词辨析题 。get sb. to think ：使 ……去思考 。make后面应该省略to ;let和push的意思都不合适 。

6. B

语义衔接 、介词搭配题 。此处 的意思是人们会对“感兴趣 的”事情进行思考 。此外 ，只有interested的介词搭配为in。

7. A

逻辑关系题 。根据句意 ，一贯喜欢多思考而非少思考 的人老了以后其认知能力更加健全 。rather than ：是 (前者 )而非 (后者 );other than ：除了……之外 ; instead of 和in place of均表示替代 。

8. B

名词辨析题 。mind ：思想感知或思维能力 。brain ： (人体器官 )大脑 ;intellect ：智力 ;mentality ：智力 ，心态 。

9. C

固定搭配题 。be convinced of ：相信 ，确信 。

10. A

固定搭配题 。put the theory to work ：将理论付诸实践 。

11. B

逻辑关系题 。根据下文 “most of us don t need that kind of skill”可知 ，多动脑并不是指“必需” (necessarily )记住大量的信息 。

12. D

词组辨析题 。四个词都表示数量大。amounts of和an amount of 后接不可数名词 ;numbers of和a number of后接可数名词的复数形式 。由此可见amount

和number在使用单数形式时都应在前面加不定冠词 。

13. A

固定搭配题 。be of interest ：有意义。“be of+名词”的结构相 当于“be+ (该名词 的 )形容词 。

14. B

语义衔接题。根据上文可知 ，研究者认为专 门进行记忆力训练不如让人的.大脑总是保持活跃或敏锐的状态 。

15. A

逻辑关系题。这里是both... and... 结构 ，表示并列关系。

16. D

语义衔接题 。四个选项 中只有(the) way后面少跟一个省略介词及关系代词which 的宾语从句，本句在way之后省略了in which 。另外从语义上来讲 ，选way (方式 )最合适 。

17. B

语义衔接及结构题 。根据后文mentally(头脑方面地 )，得知这里需要与之对应的physically (身体地 )一词 。

18. A

逻辑关系题 。who do是修饰those 的定语从句 ，those表示前文那些mentally active的人。“do”替代 “keep mentally active”这一行为。

19. C

语义衔接题。be likely to do sth ：极有可能做某事。possible不能以人作主语 。

20. B

动词辨析题。influence表示较好的影响，而affect往往表示不好的影响。根据意思 ，智力活动对脑细胞的健康和大小都会产生影响，而这种影响是积极的。