If I ______ harder for the final exam, I should have passed it.A、studyB、had st

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问题 If I ______ harder for the final exam, I should have passed it.

选项 A、study
B、had studied
C、studied
D、was studying

答案 B

解析句中的陈述与过去事实相反，因此从句用had studied，主句用should+have done 的形式。

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