-How long did the meeting last this afternoon?- How long did the _英语解答

-How long did the meeting last this afternoon?
- How long did the meeting last this afternoon
- It was supper time ______the meeting was over.
答案是when 为什么at which不行?

人气：213 ℃　时间：2019-08-28 02:14:47

解答

at which 显然是不可以的
which 表示地或物
不是时间
when才是表示时间的