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

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IntheofficeIneverseentohavetimeuntilafter5.30-manypeoplehavegonehome.whichtime,改为bywhich可以吗,为什么Inthe

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
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

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
by which是对
by +时间 这种形式见过的哟 by which 中which 指代5.30

问题是什麽?

in which =where
on which=when感觉还是用by which time