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11.
According todividedimprove    who   problem 
Tired of puzzling over a problem?Sleep on it!Research by a group of German scientists shows that getting enough sleep makes people better (51)problemsolvers.
They found that people (52)whosleep for at least eight hours each night are better at solving problems and thinking creatively.For their research study,the scientists (53)divided106people into groups.The group that got eight hours of sleep was twice as likely to find a shortcut for solving a math problem than the group that had stayed awake all night.
Skimping on sleep has become a bad habit for many American kids.(54)According to a survey by the National Sleep Foundation,51% of kids ages 10to 18go to bed at 10P.M.or later on school nights.
This is important information for parents and for kids.Getting enough sleep can (55)improve a kid's performance at school.

分析 本文是说好的睡眠能让人们更好的解决问题,研究表明每天睡至少八小时的人更擅长解决问题,对于孩子而言,足够的睡眠也能改善他的表现.

解答 51.problem.名词考查.结合句意make sb+名词,表示让某人成为…,结合前文Tired of puzzling over a problem可知这里填problem问题,名词做定语,故答案是problem.
52.who.关系词考查.people是先行词,指的是人,关系词用who,作为从句的主语,故答案是who.
53.divided.动词考查,结合106people into groups用动词divide…into…将…分成…,表达的是过去的事情用一般过去时,故答案是divided.
54.According to.短语考查,结合a survey by the National Sleep Foundation,51% of kids ages 10to 18go to bed at 10P.M.or later on school nights.用短语according to依据…,故答案是According to.
55.improve.动词考查.结合a kid's performance at school用动词improve改善,can是情态动词,后加动词原形,故答案是improve.

点评 检查单词拼写是否正确,是否有时态、语态、惯用法及词语选用上的错误,以确保答案的正确性.

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