— Iwonder why they’re late.

—They________ the train.


  1. A.
    can miss
  2. B.
    could miss
  3. C.
    may have missed
  4. D.
    might miss
D
整個(gè)時(shí)態(tài)為一般現(xiàn)在時(shí),can、could表示能夠,might表示可能。
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