Please tell Tom not to leave the classroom unless he ______ that all the lights ______A.makes sure; are turned offB.makes sure; will be turned offC.is made sure; are turned offD.will make sure; will be turned off
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A解析试题分析：句意：请告诉Tom离开教室前确保所有的灯都被关掉。第一空he和make sure是主动关系，第二空all lights和turn off之间是被动关系，故用被动语态。故选A。考点：考查动词的时态和语态。