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  3. The popular notion that older people need less sleep than younger adults is a myth, scientists said yesterday. While elderl

The popular notion that older people need less sleep than younger adults is a myth, scientists said yesterday. While elderl

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问题     The popular notion that older people need less sleep than younger adults is a myth, scientists said yesterday.
    While elderly people【B1】______to sleep for fewer hours than they did when they were younger, this has a(n) 【B2】______effect on their brains performance and they would benefit from getting more, according to research.
    Sean Drummond, a psychiatrist(心理医生)at the University of California, San Diego, said that older people are more likely to suffer from broken sleep, while younger people are better at sleeping【B3】______straight through the night.
    More sleep in old age, however, is【B4】______with better health, and most older people would feel better and more【B5】______if they slept for longer periods, he said.
    "The ability to sleep in one chunk(整块时间)overnight goes down as we age but the amount of sleep we need to【B6】______well does not change, " Dr. Drummond(old the American Association for the Advancement of Science conference in San Diego.
    "It’s【B7】______a myth that older people need less sleep. The more healthy an older adult is, the more they sleep like they did when they were【B8】______. Our data suggests that older adults would benefit from【B9】______to get as much sleep as they did in their 30s. That’s【B10】______from person to person, but the amount of sleep we have at 35 is probably the same amount as we need at 75. "
A. alert
B. associated
C. attracting
D. continuing
E. definitely
F. different
G. efficiently
H. function
I. mixed
J. negative
K. tend
L. younger
【B5】
选项
答案A
解析 空格处与and前的better为并列关系，因为空格前有more，所以空格处需要填入形容词原形，同时空格处的词语需要与better在意义上一致。alert具有“思维活跃的”的意思，符合句意，为本题答案。
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