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--- Who left the door open? --- Oh, sorry. I the door. A.ought to lock B.should

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--- Who left the door open? --- Oh, sorry. I the door. A.ought to lock B.should

--- Who left the door open?

   --- Oh, sorry. I _____ the door.

  A.ought to lock  B.should lock     C.ought to have locked    D.could lock

试题答案

C