He (could) easily (have won) a scholarship if he (would have devoted) more time to his school work.

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问题 He (could) easily (have won) a scholarship if he (would have devoted) more time to his school work.

选项 A、could
B、have won
C、would have devoted
D、his school work

答案C改为had devoted

解析 对过去事实进行虚拟,主句用could/would have done,从句用if had done结构。
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