It was in the room __ his son broke the vase.

问题描述:

It was in the room __ his son broke the vase.
A.where B.in which C.whicn D.that

选D.
此句是强调句,强调地点状语in the room.
强调句的判断方法:删去it was ---that,句子还成立的就是.