一简单选择题,郁闷,总不理解是什么从句.-- How long did the meeting last this afternoon-- It was super time ____ the meeting was over.[A] that[B] at which[C] when[D] until首先这题是什么从句后半句,主语还是定语呢.其次

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一简单选择题,郁闷,总不理解是什么从句.-- How long did the meeting last this afternoon-- It was super time ____ the meeting was over.[A] that[B] at which[C] when[D] until首先这题是什么从句后半句,主语还是定语呢.其次
一简单选择题,郁闷,总不理解是什么从句.
-- How long did the meeting last this afternoon
-- It was super time ____ the meeting was over.
[A] that
[B] at which
[C] when
[D] until
首先这题是什么从句后半句,主语还是定语呢.
其次.如果是定语,我老不清楚 什么时候用that.什么时候用when.经常判断错啊.
这题答案是C

一简单选择题,郁闷,总不理解是什么从句.-- How long did the meeting last this afternoon-- It was super time ____ the meeting was over.[A] that[B] at which[C] when[D] until首先这题是什么从句后半句,主语还是定语呢.其次
c
定语从句!
因为提问的是时间,后面的是补充那个时间是干什么的.

这是主语从句,it作形势主语,相当于When the meeting was over was super time .