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We wish we ____ what you did when we were at high school.A.d

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We wish we ____ what you did when we were at high school.A.did B.could have done C.have done D.
为什么是B.不应该是had done
wish后的虚拟规定的很清楚,用had done 的形式,
could have done 意思是本可以做而没做.与had done 都是对过去的虚拟 根据when we were at high school 语境都符合 但是前者的语气跟强烈一些 强调 本可以做而没做