2. 外语
  3. I_____him the Christmas gift by mail because he came home during the Christmas holidays.

I_____him the Christmas gift by mail because he came home during the Christmas holidays.

admin2012-06-19  41
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 主句用了一句与过去事实相反的，表示必要性的虚拟语气，D符合题意。
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