2. 外语
  3. I couldn’t have sent him the Christmas gift by mail because he came home during the Christmas holidays.

I couldn’t have sent him the Christmas gift by mail because he came home during the Christmas holidays.

admin2011-07-28  34
问题 I couldn’t have sent him the Christmas gift by mail because he came home during the Christmas holidays.
选项
答案couldn’t—needn’t
解析 根据下文可推测此句意为“我本不必把圣诞礼物给他邮去，因为他圣诞节期间回家了”。因此主句用了一句与过去事实相反的表示必要性的情态动词。
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