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问题: 模拟卷5-25

Which of us ________ to Beijing doesn't know the Great Wall of China.
A. who have been B. have been
C. that has been D. that have been
请详细写出解题的过程和思路。

解答:

C
考察定语从句
这道题是不是少了一个问号呢?
"Which of us"作为一个整体是先行词,再加上后面的助动词是"doesn't"可以知道主语是单数,
所以只有C指的是单数