C..
你打扫教室真是太好了,虽然你不需要这么做..
have to...不得不..
前面用was,过去时,所以后面用过去时..
It was very kind of you to clean the office,though you
It was very kind of you to clean the office,though you
A.needn't do B.wouldn't have
C.didn't have to D.mustn't have done
为什么选C
A.needn't do B.wouldn't have
C.didn't have to D.mustn't have done
为什么选C
英语人气：462 ℃时间：2020-04-08 17:11:06
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