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Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET. (10 points)

　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.

10．______

A.persist
B.believe
C.excel
D.feature

正确答案及解析

正确答案

解析

本题测试考生根据上下文判断词义和词语搭配的能力。persist（in)坚持，执着； believe（in)相信，认为； excel（in)擅长，善于；feature（in)在...中起作用。空格处于一个不定式结构当中，修饰能力。上文提到思考是大脑进行连接的过程，空格后则表明“推动智力发展的连接是天生的”。从选项语义来看，只有C项excel带入句中指“推动智力发展的（大脑中）善于连接的能力”，符合句子逻辑。feature in后面只能接sth. 作宾语，表示在……中起作用. ，故排除D项；persist in doing sth. “坚持，执着于做某事”是人类的品质，而非能力，因此可排除A项；B项believe（in)也不是一种能力，不足以“推动智力发展”，因此排除。