2. 外语
  3. After a day’ s hard work, we need some sleep. During the sleep, the fatigue (疲劳) of the body disappears and recuperation(恢复)begi

After a day’ s hard work, we need some sleep. During the sleep, the fatigue (疲劳) of the body disappears and recuperation(恢复)begi

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问题     After a day’ s hard work, we need some sleep. During the sleep, the fatigue (疲劳) of the body disappears and recuperation(恢复)begins. The tired mind gathers new energy, and the memory improves.
    Some adults require little sleep; others need eight to ten hours in every twenty-four hours. Infants(婴儿) sleep sixteen to eighteen hours daily, the amount gradually diminishing as they grow older. Young students may need twelve hours; university students may need ten. A worker with a physically demanding job may also need ten, whereas an executive working under great pressure may manage on six to eight. Many famous people have little sleep. Napoleon Bonaparte, Thomas Edison and Charles Darwin apparently averaged only four to six hours a night.
    Whatever your individual need, you can be sure that by the age of thirty you will have slept for a total of more than twelve years. By that age you will also have developed a sleep routine; a favorite hour, a favorite bed, a favorite position, and a rule you need to follow in order to rest comfortably.
    Investigators have tried to find out how long a person can go without sleep. Several people have reached more than 115 hours—nearly five days. Whatever the limit, it is absolute. Animals that kept awake for from five to eight days have died of exhaustion. The limit for human beings is probably about a week.
If a person is not allowed to follow his own sleep routine, he will probably______ .
选项 A、never fall asleep
B、not sleep well
C、lose his memory
D、begin to daydream
答案B
解析 题干意为“如果不让一个人按照睡眠习惯睡觉，他很可能会…”。由第三段第二句可以看出，按照自己的睡眠习惯睡觉才会睡得很舒服，如果不按照习惯睡觉就会睡得不舒服。故选B。
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