II'll tell Mary about her interview tomorrow. You ________ her the day beII'll tell Mary about her interview tomorrow.　You ________ her the day before yesterday.A. ought to tell B. would have toldC. must tell D. should have told

II'll tell Mary about her interview tomorrow. You ________ her the day beII'll tell Mary about her interview tomorrow.　You ________ her the day before yesterday.A. ought to tell B. would have toldC. must tell D. should have told
II'll tell Mary about her interview tomorrow. You ________ her the day be
II'll tell Mary about her interview tomorrow.　
You ________ her the day before yesterday.
A. ought to tell B. would have toldC. must tell D. should have told

II'll tell Mary about her interview tomorrow. You ________ her the day beII'll tell Mary about her interview tomorrow.　You ________ her the day before yesterday.A. ought to tell B. would have toldC. must tell D. should have told
D 是正确的答案

选择D.表示该做却没有做的动作。“你前天应该告诉她。”但事实上你没有告诉。

II'll tell Mary about her interview tomorrow.　
You ________ her the day before yesterday.
A. ought to tell B. would have told
C. must tell D. should have told
是选D.
II'll tell...

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II'll tell Mary about her interview tomorrow.　
You ________ her the day before yesterday.
A. ought to tell B. would have told
C. must tell D. should have told
是选D.
II'll tell Mary about her interview tomorrow.
意思是我明天会告诉Mary关于她面试的事。
You ________ her the day before yesterday.
意思是你应该在前天告诉她.
the day before yesterday是前天的意思，应该用过去完成时。
所以选D.

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选D 。句意为你本应前天就告诉她的。should have done ,或ought to have done 本应做……，A. 应该告诉，B . 本要告诉，C . 必须告诉，意思语法都不对。