问题描述：
But that he saw it,he ______ it.
A.could not have believed B.could not believe
C.did not believe D.don't believe
请问这个是应该选A还是C?是虚拟语气吗?
A.could not have believed B.could not believe
C.did not believe D.don't believe
请问这个是应该选A还是C?是虚拟语气吗?
问题解答：
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