Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter .You may not use any of the words in the bank more than once.Questions 47 to 56 are based on the following passage.The popular notion that older people need less sleep than younger adults is a myth, scientistssaid 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, saidolder people are more likely to suffer from broken sleep, while younger people are better atsleeping __49__straight through the night.More sleep in old age, however, is __50__with better health, and most older people would feelbetter 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 amountof sleep we need to __52__well does not change,” Dr Drummond told the American Associationfor 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, themore they sleep like they did when they were __54__. Our data suggests that older adults wouldbenefit from __55__to get as much sleep as they did in their 30s. That's __56__from person toperson, 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。