2. 外语
  3. I______him the birthday present by mail because he went back on a business trip that day.

I______him the birthday present by mail because he went back on a business trip that day.

admin2012-09-13  36
问题 I______him the birthday present by mail because he went back on a business trip that day.
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
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