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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 考查固定搭配。空格所在句意为“正在逐步________训练成果”，结合备选项可知，A项carry on“执行”，动作的发出者通常是人，故排除；B项put on“增加，穿上”与strengths搭配，不符合语义，故排除；D项take on“呈现”，填入空格处意为“呈现训练成果”看似合理，但课程调整和增强训练难度并非仅仅是为了呈现成果，故排除。而build on“在……基础上增加”填入空格处符合语境，意为“巩固训练成果”，故答案选C。
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