完形填空 先通读下面的短文，掌握其大意，然后在每小题所给的四个选项中，选出可以填入空白处的最佳选项。(本大题共10分，每小题1分) Up to two-thirds of children don’t get as much sleep as they should do and this can make them nervous and slower at school, researchers say. Soshould young people sleep each night? The answer is between 8 and 10 hours. If you don’t get enough sleep at night, you’ll haveenergy the next day. But the researchers say many children have missed out on 4,500 hours of sleep by the time they are 7 years old. They say that children miss sleep because they have TVs and computers in their rooms andparents don’t read to their younger children at night any more. The traditional “bedtime story” helps children to relax and fall asleep. Children with TVs and computers in their bedrooms are more likely to sleep badly and to get less than 8 hours sleep. Evenone hour’s sleep a night can mean that children do less well at school. German scientists think that yourkeeps working while you are asleep. To show that they were, they gave two groups of people a problem to work out. One group went to sleep and the other group stayed. The result? The people who slept worked out the answer more quickly, suggesting that their brains had been trying tothe answer while the people were asleep. So, make sure you get enough sleep tonight,you’ll be at your best tomorrow．
试题分析：本文叙述了充足的睡眠的重要性。每晚人们的睡眠时间应是8到10小时，如果你晚上没有足够的睡眠，第二天你将会有更少的精力。科学家通过实验证明，人们在睡觉时大脑还在一直工作。因此今晚你一定要确保有充足的睡眠，然后明天你才会有最好表现。 【小题1】考查疑问词及语境的理解。A. how much 多少，对价格提问； B. how many 多少，对数量提问；C. how long 多长，对时间段提问；D. how often多久一次，对频率提问。根据The answer is between 8 and 10 hours. 可知此处是对时间提问，故选C。句意：那么年轻人每晚的睡眠应该是多长时间？ 【小题2】考查形容词及语境的理解。 A. more更多的；B. less 更少的；C. few 很少；D. little很少。修饰不可数名词energy，结合上下文表示睡眠时间不足的人应是有更少精力，故用less，故选B。句意：如果你晚上没有足够的睡眠，第二天你将会有更少的精力。 【小题3】考查形容词及语境的理解。A. proud骄傲的； B. free 空闲的；C. poor 贫穷的； D. busy忙碌的。根据don’t read to their younger children at night any more. 可知此处表示父母忙没时间给孩子读书，故选D。句意：因为他们的房间里有电视和电脑，忙碌的父母在晚上不再给他们的小孩子读书。 【小题4】考查副词及语境的理解。 A. peacefully 和平地，平静地；B. carefully 仔细地； C. happily 幸福地；D. sadly悲伤地。故选A。句意：传统的“睡前故事”帮助孩子放松，睡觉平静。 【小题5】考查动词及语境的理解。A. losing 失去；B. lost 失去； C. loser失败者； D. loss损失。此处做主语，故用动名词形式，故用losing，故选A。句意：甚至一晚上失去一个小时的睡眠时间会使孩子在学校表现更差。 【小题6】考查名词及语境的理解。A. head 头； B. brain 大脑； C. heart 心脏； D. thought思想。根据The people who slept worked out the answer more quickly, suggesting that their brains had been trying tothe answer while the people were asleep.可知此处指人睡觉时大脑还在工作，故选B。句意：德国科学家认为你睡觉时大脑一直在工作。 【小题7】考查形容词及语境的理解。 A. perfect 完美的； B. bright 明亮的；C. right 正确的； D. great伟大的。根据后文的The people who slept worked out the answer more quickly, suggesting that their brains had been trying tothe answer while the people were asleep. 可知此处他们说的是正确的，故选C。句意：为了证明他们说的正确。 【小题8】考查形容词及语境的理解。 A. awake 醒着的； B. alive 活着的；C. asleep 睡着的； D. absent缺席的。此处went to sleep“去睡觉” 和stayed awake“保持醒着”相对立，故选A。句意：一组人去睡觉，另一组人保持醒着。 【小题9】考查动词短语及语境的理解。 A. think over 反复思考； B. open up 打开； C. find out 查明，弄清楚；D. put down记下。根据they gave two groups of people a problem to work out可知他们要解决这个问题，因此要弄清楚它，故选C。句意：表明人们睡觉时他们的大脑一直在查明这个问题。 【小题10】考查连词及语境的理解。A. or 或者；B. but 但是； C. if 如果； D. and而且。结合上下文，睡眠充足，表现就好，此处表示承接关系，故用连词and，故选D。句意：因此今晚你一定要确保有充足的睡眠，然后明天你才会有最好表现。 考点：健康保健类短文。