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  3. 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

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

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问题     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【C1】______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【C2】______, we refer to these occurrences as "senior moments."【C3】______seemingly innocent, this loss of mental focus can potentially have a(n)【C4】______ impact on our professional, social, and personal【C5】______.
    Neuroscientists, experts who study the nervous system, are increasingly showing that there’s actually a lot that can be done. It【C6】______out that the brain needs exercise in much the same way our muscles do, and the right mental【C7】______can significantly improve our basic cognitive【C8】______. Thinking is essentially a【C9】______of making connections in the brain. To a certain extent, our ability to【C10】______in making the connections that drive intelligence is inherited.【C11】______, because these connections are made through effort and practice, scientists believe that intelligence can expand and fluctuate 【C12】______mental effort.
    Now, a new Web-based company has taken it a step【C13】______and developed the first "brain training program" designed to actually help people improve and regain their mental【C14】______.
    The Web -based program【C15】______you to systematically improve your memory and attention skills. The program keeps【C16】______of your progress and provides detailed feedback【C17】______your performance and improvement. Most importantly, it【C18】______modifies and enhances the games you play to【C19】______on the strengths you are developing—much like a (n)【C20】______exercise routine requires you to increase resistance and vary your muscle use.
【C19】
选项 A、carry
B、put
C、build
D、take
答案C
解析 考查动词辨析。本句意为“这个程序能不断修正你训练的项目并加强难度，以此帮助你在进步的______更上一层楼”。其实本句话的意思就是你的进步会建立在你已经获得的力量(进步、技能等)的基础上，这是个积极的、不断自我进步、向前的过程。故C．build和on搭配意为“依靠，以…为基础”，符合文意。carry on“继续”，put on“穿上，增加”，take on“承担，接纳；呈现”均不符合逻辑。
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