Question

"The clever boy made a hole in the wall, ________ he could see what was going on "

"The clever boy made a hole in the wall, ________ he could see what was going on inside the house．
A. on which
B. at which
C. through which
D. in which"

Answer 1

答案C
考查“介词+which”引导的定语从句，即“通过这个洞”through which。

Answer 2

选择
c。。首先，后面那个空格肯定要填写what,然后第一句有一个逗号，所以需要连接词，综合考虑，c比较合适