Questions 47 to 56 are based on the followingpassage.
The popular notion that older people need lesssleep than younger adults is a myth, scientists saidyesterday.
While elderly people __47__ to sleep for fewerhours than they did when they were younger, thishas a(n) __48__ effect on their brain'sperformance 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 betterat sleeping __49__ straight through the night.
More sleep in old age, however, is __50__ with better health, and most older peoplewould 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 theamount of sleep we need to __52__ well does not change,” Dr Drummond told the AmericanAssociation 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 adultis, the more they sleep like they did when they were __54__. Our data suggests that olderadults 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 aswe need at 75.”
A) alert I) formally
B) associated J) function
C) attracting K) mixed
D) cling L) negative
E) continuing M) sufficient
F) definitely N) tend
G) different O) younger
