Question

3．閱讀下面短文，掌握其大意，然后從A、B、C、D四個選項中選出最佳選項．
    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．a(chǎn)t	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．a(chǎn)wake	B．a(chǎn)live	C．a(chǎn)sleep	D．a(chǎn)bsent
39．A．think over	B．open up	C．find out	D．put down
40．A．or	B．but	C．if	D．a(chǎn)nd．

Answer 1

分析 本文敘述了充足的睡眠的重要性．每晚人們的睡眠時間應是8到10小時，如果你晚上沒有足夠的睡眠，第二天你將會有更少的精力．科學家通過實驗證明，人們在睡覺時大腦還在一直工作．因此今晚你一定要確保有充足的睡眠，然后明天你才會有最好表現(xiàn)．

解答 31．C 考查疑問詞的辨析．how much 多少，對價格提問； B．how many 多少，對數(shù)量提問；C．how long 多長，對時間段提問；D．how often多久一次，對頻率提問．根據(jù)The answer is between 8 and 10 hours．可知此處是對時間提問，句意：那么年輕人每晚的睡眠應該是多長時間？故選C．
32．A．考查形容詞的辨析．more更多的；B．less 更少的；C．few 很少；D．little很少．修飾不可數(shù)名詞energy，結(jié)合上下文表示睡眠時間不足的人應是有更少精力，故用less，故選B．
33．A考查固定詞組．結(jié)合句意：但是研究人員說，許多孩子在7歲時就錯過了4500個小時的睡眠．by the time  到…時候為止，故選A．．
34．D 考查形容詞的辨析．proud驕傲的； B．free 空閑的；C．poor 貧窮的； D．busy忙碌的．根據(jù)don't read to their younger children at nigh
t any more．可知此處表示父母忙沒時間給孩子讀書，結(jié)合句意：因為他們的房間里有電視和電腦，忙碌的父母在晚上不再給他們的小孩子讀書．故選D．
35．A．考查副詞的辨析．peacefully 和平地，平靜地；B．carefully 仔細地； C．happily 幸福地；D．sadly悲傷地．句意：傳統(tǒng)的"睡前故事"幫助孩子放松，睡覺平靜．故選A．
35．A 考查動詞的辨析． losing 失去；B．lost 失去； C．loser失敗者； D．loss損失．此處做主語，故用動名詞形式，故用losing，故選A．句意：甚至一晚上失去一個小時的睡眠時間會使孩子在學校表現(xiàn)更差．
36．B 考查名詞的辨析．head 頭； B．brain 大腦； C．heart 心臟； D．thought思想．根據(jù)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．可知此處指人睡覺時大腦還在工作，故選B．
37．C 考查形容詞的辨析．A．perfect 完美的； B．bright 明亮的；C．right 正確的； D．great偉大的．根據(jù)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．可知此處他們說的是正確的，故選C．
38．A 考查形容詞的辨析．A．a(chǎn)wake 醒著的； B．a(chǎn)live 活著的；C．a(chǎn)sleep 睡著的； D．a(chǎn)bsent缺席的．此處went to sleep"去睡覺"和stayed awake"保持醒著"相對立，結(jié)合句意：句意：一組人去睡覺，另一組人保持醒著．故選A．
39．C 考查動詞詞組的辨析． A．think over 反復思考； B．open up 打開； C．find out 查明，弄清楚；D．put down記下．根據(jù)they gave two groups of people a problem to work out可知他們要解決這個問題，因此要弄清楚它，故選C．
40．D 考查連詞的辨析．or 或者；B．but 但是； C．if 如果； D．a(chǎn)nd而且．結(jié)合上下文，睡眠充足，表現(xiàn)就好，此處表示承接關系，故用連詞and，結(jié)合句意：句意：因此今晚你一定要確保有充足的睡眠，然后明天你才會有最好表現(xiàn)．故選D．

點評 首先要通讀全文，了解大意，緊緊抓住上下文所提供的信息，然后明確詞義，詞型，詞的搭配，并按上下文需要作答，然后讀全文，校對答案．