. ------ The door was open.----- It open. I had locked it myself and the key was in my poc

发布时间：2020-08-16 10:27:50


. ------ The door was open.
----- It     open. I had locked it myself and the key was in my pocket.
A. can’t be
B. mustn’t be
C. can’t have been
D. mustn’t have been

网友回答

A. can’t be
B. mustn’t be
(答案→)C. can’t have been
D. mustn’t have been
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