The popular notion that older people need less sleep than younger adults is a myth, scientists reported on a well-acknowledged p

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问题     The popular notion that older people need less sleep than younger adults is a myth, scientists reported on a well-acknowledged periodical yesterday.
    While elderly people【C1】________ to sleep for fewer hours than they did when they were younger, this has a negative effect on their brain’s performance and they would benefit from getting more, according to the research.
    Sean Drummond, a psychiatrist at the University of California, San Diego, said older people are more likely to suffer from【C2】________ sleep, while younger people are better at sleeping【C3】________ straight through the night. More sleep in old age, however, is【C4】________ with better health, and most older people would feel better and more【C5】________ if they slept for longer periods instead of the four or five hours per night, he said.
    "The ability to sleep in one chunk overnight goes down as we【C6】________ but the amount of sleep we need to【C7】________ well does not change,"  Dr. Drummond told the American Association for the Advancement of Science conference in San Diego.
    "It’s【C8】________ a myth that older people need less sleep. The healthier an older adult is, the more they sleep like they did when they were younger. Our data suggests that older adults would【C9】________ from continuing to get as much sleep as they did in their 30s. That’s different from person to person, but the amount of sleep we had at 35 is【C10】________ the same amount as we need at 75."
    A. alert      B. associated      C. function      D. negative
    E. age        F. definitely      G. probably      H. intend
    I. benefit    J. efficiently     K. tend          L. effectively
    M. broken     N. smart           O. behave
【C7】

选项

答案C

解析 词义辨析题。根据词性,此处应当填入动词。文章指出我们正常机体运作所需的睡眠时间是不变的,故根据文意可选的范围是 “function,behave”,但behave well通常指“举止有礼”,故function为最佳答案。
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