首页 > 留学知识库

问题: FDPH1-32

The reason for all the changes being made __________ to us.
A.explained B.had explained
C.was explained D.were explained
请详细写出解题的过程和思路。

解答:

C

The reason for all the changes being made __________ to us.

reason - 主语
for all the changes - 定语修饰REASON
being made - 定语修饰CHANGES
明显缺少动词
reason当然是要被解释。所以确定用被动语态。
reason是单数.所以动词用单数
选项均为过去。动词确认为WAS
答案出来:为C。