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  3. Not getting enough sleep doesn’t just make you tired. It also makes you fat because of increased food-eating, according to resea

Not getting enough sleep doesn’t just make you tired. It also makes you fat because of increased food-eating, according to resea

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问题     Not getting enough sleep doesn’t just make you tired. It also makes you fat because of increased food-eating, according to researchers in America.
    The researchers【B1】_____ a study which included eight men and eight women, and found that participants who lacked sleep for a week【B2】_____ almost two pounds. To【B3】_____ a standard, participants spent the first three nights sleeping up to nine hours a night, and consumed only as many calories as they burned each day. Their【B4】_____amount of food and oxygen, and production of carbon dioxide were【B5】_____. Then the participants【B6】_____two groups, with one limited to sleeping five hours a night, while the other continued to be allowed nine hours. After five nights, the groups【B7】_____. During this part of the experiment, the participants were allowed to eat as much as they wanted.
    The researchers found that the participants burned about five percent more calories when their sleep was limited to five hours, but they consumed about six percent more calories,【B8】_____when they were allowed nine hours.
    Although the participants ate less at breakfast when they had five hours of sleep, they ate more over the rest of the day: they【B9】_____consumed an increased number of calories after the dinner and finally gained weight. When they【B10】_____adequate sleep patterns, they lose the pounds.
【B7】
选项
答案switched
解析 根据空格所在位置可知，空格处应填入谓语动词(词组)。结合录音可填入switched，意为“调换”。
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