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  3. Researchers have established that when people are mentally engaged, biochemi

Researchers have established that when people are mentally engaged, biochemi

游客2023-10-26  30
问题     Researchers have established that when people are mentally engaged, biochemical changes occur in the brain that allow it to act more effectively in cognitive (认知的) areas 【C1】_____ attention and memory.
    This is true regardless of age.
    People will be alert and receptive 【C2】_____ they are faced with information that 【C3】_____ them to think about things they are interested in. And someone 【C4】_____ a history of doing more 【C5】_____ than less will go into old age more cognitively 【C6】_____ than someone who has not had an active mind.
    Many experts are so 【C7】_____ of the benefits of challenging the brain 【C8】_____ they are putting the theory to 【C9】_____ in their own lives. "The idea is not 【C10】_____ to learn to memorize enormous amounts of information," says James Fozard, associate director of the National Institute 【C11】_____ Aging.
    "Most of us don’t need that kind of skill. Such specific 【C12】_____ is of less interest than being able to maintain mental 【C13】_____. " Fozard and others say they challenge their brains work.
    Gene Cohen, acting director of the same institute, 【C14】_____ that people in their old age should 【C15】_____ in mental and physical activities 【C16】_____ as well as in groups. Cohen says that we are frequently advised to keep physically active as we age, 【C17】_____ older people need to keep mentally active as well. Those who do are more 【C18】_____ to maintain their intellectual abilities and to be generally happier and better 【C19】_____. "The point is, you need to do 【C20】_____ ." Cohen says, "Intellectual activity actually influences brain-cell health and size." [br] 【C15】
选项 A、focus
B、involve
C、engage
D、attend
答案 C
解析 考查动词辨析。根据下文的activities可推断此处表示“参加”之义，engage in“参加”，符合文意，故选C。focus常跟on搭配，表示“致力于”；involve为及物动词，表示“参与”时，常用于involve sb．in或be involved in结构中，这与原文不符，故排除；attend也表“参加”，但为及物动词，后面直接跟名词。
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