---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
问题描述：
---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
答
A。
现在完成时
答
答案 选C 一般进行时 复数形式
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?