Now he works in the factory _________ his father used to work.

题目

Now he works in the factory _________ his father used to work.
A.where B.when C.in which D.that
Where 那么in which 为什么不选呢 还是出错了

答案

这个是应该选where,这个肯定是对的,具体我有点解释不清楚.