— Make sure all the lights when you leave the room.— OK I will.A. turn onB. are turn onC

问题补充：

— Make sure all the lights when you leave the room.

— OK, I will.

A. turn on

B. are turn on

C. are turned off

D. turn off

答案：

A. turn on

B. are turn on

(答案→)C. are turned off

D. turn off

解析：turn on打开； are turn on 语法错误，be动词一般不和原形动词连用；are turned off被关掉； turn off关掉。句意：当你离开房间时，确信所有灯都被关掉了。句子主语是动作对象，故用被动语态。