3.The light in the room------before you leave.A.are turned B.must be turned off如果知道答案,请说明理由.

分类: 作业答案 • 2022-06-23 16:39:54

问题描述：

3.The light in the room------before you leave.A.are turned B.must be turned off
如果知道答案,请说明理由.

答

B.must be turned off
你离开前必须关灯.