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2013年下半年，英语四级将改革，局部题型发生变化。选词填空在英语四级考试中，是考生们很难逾越的难关，很多考生做到这类题型都会选择直接放弃。其实，只要大量练习，再加上归纳总结，选词填空拿高分并不难。下面小编整理了选词填空题型训练，希望对考生们有帮助。
The popular notion that older people need less sleep than younger adults is a myth, scientists said yesterday.
While elderly people __47__ to sleep for fewer hours than they did when they were younger, this has a(n) __48__ 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 __49__ straight through the night.
More sleep in old age, however, is __50__ with better health, and most older people would feel better and more __51__ 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 __52__ well does not change," Dr Drummond told the American Association for the Advancement of Science conference in San Diego.
"It's __53__ 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 __54__. Our data suggests that older adults would benefit from __55__ to get as much sleep as they did in their 30s. That's __56__ from person to person, but the amount of sleep we had at 35 is probably the same amount as we need at 75."
注意：此部分试题请在答题卡2上作答。
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
