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All the students ________ laughter when ...

All the students ________ laughter when John walked into the classroom like Donald Duck.

A.burst into B.broke out C.burst out D.broke up

 

A 【解析】 考查动词短语。句意:当约翰像唐老鸭一样走进教室时,所有的学生都哄堂大笑。A. burst into 爆发;B. broke out战争,疾病爆发;C. burst out突然…起来;D. broke up关系破裂。burst into laughter=burst out laughting为固定搭配,意为“开怀大笑”,结分析句子所填空后为laughter。故选A项。  
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