the clever boy made a hole in the wall ,through which he could see what was happening inside the hoA in which B through which C at which D on which主句与从句是什么关系?为什么选B
问题描述：
the clever boy made a hole in the wall ,through which he could see what was happening inside the ho
A in which B through which C at which D on which主句与从句是什么关系?为什么选B
答
through which中which指代的是hole,因此通过这个洞,通过必须用through这个介词,其它介词in on at都不对.through which he could see what was happening inside 是一个非限制性定语从句修饰先行词a hole