Mary must have received my mail; otherwise she would have replied before now.A、M

游客2023-12-25 25

问题 Mary must have received my mail; otherwise she would have replied before now.

选项 A、Mary should
B、Mary ought to
C、Mary shouldn’t
D、Mary couldn’t

答案 D

解析玛丽应该没有收到我的邮件，否则她早就回复我了。本题考查错综条件虚拟语气。根据“否则她早就回复我了”判断，玛丽没有收到邮件。没有收到邮件是已经发生的事情，画线部分对过去的事情表示假设，故应该用could not have done sth. 结构，正确答案为D项。

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