The lights must___before you leave the classroomA.turn on B.turn off C.be turning on D.be turned off

分类: 作业答案 • 2022-07-15 13:53:03

问题描述：

The lights must___before you leave the classroom
A.turn on B.turn off C.be turning on D.be turned off

答

D，你出门的时候必须关灯，灯是被关

答

D be turned off
sth must be turned off before.