题目内容
The light is still on. They ___ to turn it off when they left the room.
A. must forget B. could have forgotten
C. may forget D. must have forgotten
D
解析:
略
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题目内容
The light is still on. They ___ to turn it off when they left the room.
A. must forget B. could have forgotten
C. may forget D. must have forgotten
D
略