-The door was open.
-It ______ open. I had locked it myself and the key was in my pocket.
A.can not be | B.must not be | C.can not have been | D.must not have been |
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-The door was open.
-It ______ open. I had locked it myself and the key was in my pocket.
A.can not be | B.must not be | C.can not have been | D.must not have been |