who cleaned the classroom yesterday - dick ----- .

问题描述:

who cleaned the classroom yesterday - dick _____ .
A.cleaned B.did C.is D.does
1个回答 分类:英语 2014-10-28

问题解答:

我来补答
B
这是简略回答,不需要把整个句子都说完,只要用助动词do来代替就行了,yesterday说明是过去的事情.用过去时did
 
 
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