题目

The clever boy made a hole in the wall,_______ he could see what was going on inside the house.A.
The clever boy made a hole in the wall,_______ he could see what was going on inside the house.
A.by which
B.by that
C.through which
D.of which

提问时间：2020-07-18

答案

句子拆分：
The clever boy made a hole in the wall
He could see what was going on inside the house through the hole
由此可见：
介词用的是through
定语从句中的 which 指代a hole
综上,选C