题目内容
Kids have to take many extra classes after school classes. They _______ hard to study for good grades.
A. push
B. are pushed
C. are pushing
D. have pushed
B 【解析】 句意:孩子们不得不上很多课外班。他们刻苦学习以求好成绩。考查被动语态。句中的they指上文的kids,是动词push的受动者,需用被动语态;根据句意结构,可知选B。
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