这题应该怎么选"I ---my grandparents clean their room last Monday."

问题描述:

这题应该怎么选"I ___my grandparents clean their room last Monday."
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1个回答 分类:英语 2014-10-25

问题解答:

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helped
“last Monday”是一个过去时间,所以用过去时
 
 
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