The light is still on. He _____ to turn it off when he _____ the room.
A.may forget: leave | B.must have forgotten : left |
C.may forget : have left | D.could have forgotten : left |
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The light is still on. He _____ to turn it off when he _____ the room.
A.may forget: leave | B.must have forgotten : left |
C.may forget : have left | D.could have forgotten : left |