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It's time you ____ your homework.A.did B.do C.to do D.will do 请问应该选哪个,麻烦说下为什么?

题目详情
It's time you ____ your homework.A.did B.do C.to do D.will do 请问应该选哪个,麻烦说下为什么?
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答案和解析
A
it is time that -- 早该做什么了,应用虚拟语气:
it is time that --+-should--
it is time that + 一般过去时