If you hard, you in the exam.A、worked/ wouldn’t have failedB、

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问题 If you ________ hard, you ________ in the exam.

选项 A、worked/ wouldn’t have failed
B、had worked/wouldn’t fail
C、had worked/wouldn’t have failed
D、worked/wouldn’t fail

答案 C

解析这是对过去行为的虚拟，结构是If+主语+过去完成时……，主语+would have done(即 would接不定式的完成式)。

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If you ________ hard, you ________ in the exam.A、worked/ wouldn’t have failedB、