---What do you think is the best time to go on a summer trip?---Well,I think the best time is the first few days of the summer break when people ____ anything yet.A.haven't done B.won't do C.don't do D.aren't doing 请作说明
人气：431 ℃ 时间：2019-08-22 14:47:01
解答
A.haven't done
yet的原因 因为 yet前边一般用完成时态 你看
Have you had your breakfast yet?
你到现在吃过早饭了吗?
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