题目内容

Jack ________ my letter, otherwise he would have replied before now.


  1. A.
    mustn’t have received
  2. B.
    shouldn’t have received
  3. C.
    can’t receive
  4. D.
    couldn’t have received
D
杰克一定没有收到我的信,要不然在现在之前他早回信了。
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