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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
【B1】
选项
答案K
解析 空格后面为不定式短语，而且句子没有谓语动词，因此空格处需要填入动词。前一段中提到了popular notion(普遍的看法)，此处tend to do意为“往往，一般，趋向于”，承接上文提到的“老年人需要较少的睡眠时间”，符合句意。由此确定动词tend为本题答案。
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