题目内容
— 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】
C
【解析】
试题分析：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。
考点：被动语态与短语辨析
点评：此类题型主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态，反之如果是动宾关系，则用被动语态。
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