题目内容

—Did they clean the house yesterday afternoon?
—______. They cleaned it this morning. 
A.No, they don’tB.Yes, they did
C.No, they didn’tD.Yes, they do
C

这题考查一般过去时的一般疑问句的否定回答。肯定回答是:Yes,I did.否定回答是:No, I didn’t. 所以选C。
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