Question

Please tell Tom not to leave the classroom unless he ______ that all the lights ______

1. A.
   makes sure; are turned off
2. B.
   makes sure; will be turned off
3. C.
   is made sure; are turned off
4. D.
   will make sure; will be turned off

Answer 1

A
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。