问题 选择题

You have to stay behind if your homework         before five o'clock.

A.wasn’t done

B.hasn’t done

C.doesn't do

D.isn't done

答案

答案:D

题目分析:句意:如果你在五点前没有完成做业,你必须留下。stay behind留下;homework作业,只能被做,应为被动语态;根据have to可知为一般现在时 ,故选D.

单项选择题 B1型题
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