Question

3．阅读下面短文，掌握其大意，然后从A、B、C、D四个选项中选出最佳选项．
    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．
    So（31）C should young people sleep each night？The answer is between 8 and 10 hours．
If you don't get enough sleep at night，you'11 have（32）Benergy the next day．
    But the researchers say many children have missed out on 4，500 hours of sleep（33）Athe time they are 7 years old．They say that children miss sleep because they have TVs and computers in their rooms and（34）D parents don't read to their younger children at night any more．The traditional"bedtime story"helps children to relax and fall asleep（35）A．Children  with TVs and computers in their bedrooms are more likely to sleep badly，and to get less than 8 hours sleep．Even losing one hour's sleep a night can mean that children do less well at school．
  German scientists think that your （36）Bkeeps working while you are asleep．To show thatthey were （37）C，they gave two groups of people a problem to work out．One group went tosleep and the other group stayed（38）A．The result？The people who slept worked out the answer more quickly，suggesting that their brains had been trying to（39）Cthe answer while the people were asleep．So，make sure you get enough sleep tonight，（40）Dyou'll be at your best tomorrow．

31．A．how much	B．how many	C．how long	D．how often
32．A．more	B．1ess	C．few	D．1ittle
33．A．by	B．at	C．on	D．during
34．A．proud	B．free	C．poor	D．busy
35．A．peacefully	B．carefully	C．happily	D．sadly
36．A．head	B．brain	C．heart	D．thought
37．A．perfect	B．bright	C．right	D．great
38．A．awake	B．alive	C．asleep	D．absent
39．A．think over	B．open up	C．find out	D．put down
40．A．or	B．but	C．if	D．and．

Answer 1

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．

解答 31．C 考查疑问词的辨析．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，句意：那么年轻人每晚的睡眠应该是多长时间？故选C．
32．A．考查形容词的辨析．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．
33．A考查固定词组．结合句意：但是研究人员说，许多孩子在7岁时就错过了4500个小时的睡眠．by the time  到…时候为止，故选A．．
34．D 考查形容词的辨析．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 nigh
t any more．可知此处表示父母忙没时间给孩子读书，结合句意：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．故选D．
35．A．考查副词的辨析．peacefully 和平地，平静地；B．carefully 仔细地； C．happily 幸福地；D．sadly悲伤地．句意：传统的"睡前故事"帮助孩子放松，睡觉平静．故选A．
35．A 考查动词的辨析． 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．
36．B 考查名词的辨析．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 to the answer while the people were asleep．可知此处指人睡觉时大脑还在工作，故选B．
37．C 考查形容词的辨析．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 to the answer while the people were asleep．可知此处他们说的是正确的，故选C．
38．A 考查形容词的辨析．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，结合句意：句意：一组人去睡觉，另一组人保持醒着．故选A．
39．C 考查动词词组的辨析． 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．
40．D 考查连词的辨析．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，结合句意：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．故选D．

点评 首先要通读全文，了解大意，紧紧抓住上下文所提供的信息，然后明确词义，词型，词的搭配，并按上下文需要作答，然后读全文，校对答案．