In the office I never seen to have time until after5.30-many peop_英语解答

In the office I never seen to have time until after5.30-many people have gone home.
which time,改为by which可以吗,为什么

人气：255 ℃　时间：2019-08-18 05:38:02

解答

by which是对
by +时间这种形式见过的哟 by which 中which 指代5.30那为什么正确答案还要加个time我认为不要time,你说呢？