2. 外语
  3. Researchers have established that when people are mentally【C1】______biochemical changes occur in the brain that allow it to【C2】_

Researchers have established that when people are mentally【C1】______biochemical changes occur in the brain that allow it to【C2】_

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问题     Researchers have established that when people are mentally【C1】______biochemical changes occur in the brain that allow it to【C2】______more effectively in cognitive (认知的) areas such as attention and memory. This is true【C3】______age.
    People will be alert and【C4】______if they are faced with information that【C5】______them to think about things they are【C6】______in. And someone with a history of doing more【C7】______less will go into old age more cognitively sound than someone who has not had an active 【C8】______.
    Many experts are so convinced【C9】______the benefits of challenging the brain that they are【C10】______the theory to work in their own lives. "The idea is not【C11】______to learn to memorize enormous【C12】______of information," says James Fozard, associate director of the National Institute on Aging. "Most of us don’t need that kind of skill. Such specific training is【C13】______less interest than being able to maintain mental【C14】______." Fozard and others say they challenge their brains with different mental skills,【C15】______because they enjoy them and because they are sure that their range of activities will help the【C16】______their brains work.
    Gene Cohen, acting director of the same institute, says that we are frequently advised to keep【C17】______active as we age, but older people need to keep mentally active as well. Those who【C18】______are more【C19】______to maintain their intellectual abilities and to be generally happier and better adjusted. And intellectual activity actually【C20】______brain-cell health and size.
【C14】
选项 A、function
B、alertness
C、activity
D、shape
答案B
解析 语义衔接题。根据上文可知，研究者认为专门进行记忆力训练不如让人的大脑总是保持活跃或敏锐的状态。
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