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

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

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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【C1】______to sleep for fewer hours than they did when they were younger, this has a(n) 【C2】______ effect on their brain’ s 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 older people are more likely to suffer from broken 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, he said.
   "The ability to sleep in one chunk (整段时间) overnight goes down as we age but the amount of sleep we need to【C6】______well does not change," Dr. Drummond told the American Association for the Advancement of Science conference in San Diego.
   "It’s【C7】______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【C8】______. Our data suggests that older adults would benefit from 【C9】______ to get as much sleep as they did in their 30s. That’ s【C10】______from person to person, but the amount of sleep we had at 35 is probably the same amount as we need at 75."
   A) alert B) associated C) attracting D) cling
   E) continuing F) definitely G) different H) efficiently
   I) formally J) function K) mixed L) negative
   M) sufficient N) tend O) younger
【C3】
选项
答案H
解析 此空在动词之后且不缺成分，可知这里填副词的可能性很大，且从while可以看出作者是要在这里进行前后对比说明老年人睡觉效率低，即年轻人效率高，这里只有efficiently符合题意，意为整夜都睡眠效率很高。
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