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问题: 从句中的究竟缺什么词?

_____surprises us most is that she doesn't even know_______ the difference between the two lies .
A. What ; where B. What; which
C. What; what D. That ; where

解答:

A.

surprises us前面的词是从句surprises us的主语,又是主句is that的主语,所以这个词只能是what。that只能做从句或者主句的主语,做不了同时两个主语。

下面know后面的词在从句the difference between the two lies中只能做状语。lie是不及物动词,所以which 和what都不正确,只能是where,意思是

最让我们惊奇的是她甚至不知道两者的不同之处在哪。