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
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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
解析