I ______ him the Christmas gift by mail because he came home during the Christmas holidays.

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问题 I ______ him the Christmas gift by mail because he came home during the Christmas holidays.

选项 A、ought to have sent
B、couldn’t have sent
C、must have sent
D、needn’t have sent

答案D

解析句意：我本不必把圣诞礼物给他邮去，因为他圣诞节期间回家了。主句用了一句与过去事实相反的表示必要性的虚拟语气，符合题意。

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专业英语四级

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