—Whyistheclassroomsodirty?—Sorry,sir. It yesterda...
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问题详情:
—Why is the classroom so dirty?
—Sorry,sir. It yesterday We forgot to do it.
A.doesn’t clean B.didn’t clean
C.isn’t cleaned D.wasn’t cleaned
【回答】
D
知识点:动词语态
题型:选择题
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