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The light is still on. He to turn it off when he the room.A.may forget: leaveB.m

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The light is still on. He to turn it off when he the room.A.may forget: leaveB.m

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

试题答案

B