中文谷--Whyistheclassroomsodirty?一Sorry,sir.It
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问题详情：
-- Why is the classroom so dirty?
一Sorry, sir. It _______ yesterday．We forgot to do it．
A．don't clean B. didn't clean C. weren’t cleaned D. wasn't cleaned
【回答】
D
知识点：动词语态
题型：选择题
标签：
SorrysirIt
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