The clever boy made a hole in the wall ,___he could see ___was going on inside hous .

题目

The clever boy made a hole in the wall ,___he could see ___was going on inside hous .
A.which;what B.through which;what C.through that;what D.what;that 幫忙選一下,記得解釋原因!

答案

B 后面分句意思是“通过它,他可以看见屋内发生的事情” 前面“通过” 要用介词,through which 第二个空又是一个定语从句,没有先行词,必须用what 追问： 那為什麼不能用through that? 回答： 有 介词 的时候,不能用that 只能用which