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    As many people hit middle age, they often start to notice that their memory and mental clarity are not what they used to be. We suddenly can’t remember (1)_____ we put the keys just a moment ago, or an old acquaintance’s name, or the name of an old band we used to love. As the brain (2)_____, we refer to these occurrences as “senior moments.” (3)_____ seemingly innocent, this loss of mental focus can potentially have a(n) (4)_____ impact on our professional, social, and personal (5)_____.

     Neuroscientists, experts who study the nervous system, are increasingly showing that there’s actually a lot that can be done. It (6)_____ out that the brain needs exercise in much the same way our muscles do, and the right mental (7)_____ can significantly improve our basic cognitive (8)_____. Thinking is essentially a (9)_____ of making connections in the brain. To a certain extent, our ability to (10)_____ in making the connections that drive intelligence is inherited. (11)_____, because these connections are made through effort and practice, scientists believe that intelligence can expand and fluctuate (12)_____ mental effort.

     Now, a new Web-based company has taken it a step (13)_____ and developed the first “brain training program” designed to actually help people improve and regain their mental (14)_____.

     The Web-based program (15)_____ you to systematically improve your memory and attention skills. The program keeps (16)_____ of your progress and provides detailed feedback (17)_____ your performance and improvement. Most importantly, it (18)_____ modifies and enhances the games you play to (19)_____ on the strengths you are developing—much like a(n) (20)_____ exercise routine requires you to increase resistance and vary your muscle use.

(14)

A
sharpness
B
stability
C
framework
D
flexibility
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答案:

A

解析:

答案精析:名词辨析题。本空应填入mental修饰的名词,作improve and regain的宾语。文章首句提到人到中年,人类的记忆力和大脑清晰度会降低,此处应填入和mental clarity相对应的词,故选择sharpness。

错项排除:B项stability“稳定性”表示大脑自身的一种特点,和前文说的记忆力减退没有关系,故排除。C项framework“框架”,原文中并没有提到有关大脑框架的信息,故排除。D项flexibility“灵活性”,原文说的是大脑的记忆力和思维不如以前清晰,大脑灵活性与思维清晰度无关,故排除。

长难句分析:Now, a new Web-based company has taken it a step further and developed the first “brain training program” designed to actually help people improve and regain their mental sharpness.

本句为主谓宾结构的简单句,但句子中含有两个并列的谓语,即has taken和(has) developed。designed to作后置定语,修饰前面的program,相当于“brain training program” which is designed to actually help people…。

句意为:现在,一家网络公司进一步采取行动,研发了第一个“大脑训练项目”,旨在帮助人们提高并重获头脑敏锐度。

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