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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.

(18)

A
irregularly
B
habitually
C
constantly
D
unusually
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答案:

C

解析:

答案精析:副词辨析题。根据语义“最重要的是,它会________调整并升级有关训练游戏。”空格后的to…on the strengths是指该训练的目的,而strengths应该是一种不断积累的过程,需要不断的调整和训练。由此可推断,大脑训练的课程应该是不断地对训练内容进行调整来提升大脑的敏锐度,故本空应填入constantly,同时和后文的are developing(不断发展)形成呼应。

错项排除:A项irregularly“不规则地”和D项unusually“异常地”无法表示大脑训练课程的优势,与原文意思不符,故排除。B项habitually“习惯地”通常表示习惯性的动作,主语一般为人,不能用于形容课程,故排除。

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