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---Jack, how did it __________ that you made so many mistakes in your homework?

   --- I myself haven’t figured them out yet.

A. occur to      B. come about      C. bring about     D. get down

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对话填空:

阅读下面对话,掌握其大意,并根据所给字母的提示,在标有题号的横线上写出一个英语单词的完整、正确形式,使对话通顺。

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B:I r  4   my motorbike to school yesterday morning.When I p  5   the crossing, a car came over suddenly and k  6   me down to the ground.

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Attention deficit (不足) hyperactivity (活动过度) disorder is known by the letters A. D. H. D. with A. D. H. D. might have trouble paying attention. They might not seem to listen and might forget things. They might not be able to stay seated or play quietly. They might talk too much and act and speak without thinking about the results of their behavior. These are among the signs named on the web site of America's Centers for Disease Control and Prevention.
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Title
The finding of (76)_____.
The (77) _____ of
Children
with A.D.H. D.
They are lacking in, (78)_______.
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Perhaps they are (79 )______.
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The ( 82 ) _____of
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Levels of some proteins are lower than normal.
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