He is leaving for Shanghai ________ time to have a meeting．


  1. A.
    in three day's
  2. B.
    after three day's
  3. C.
    after three days
  4. D.
    in three days'
D
注意表示将来时间的介词“in”，同时要注意使用可数名词复数形式的名词所有格．
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