作业帮Please don't leave without___the lights.A.turn off B.to turn off C.turning off D.turn on
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Please don't leave without___the lights.A.turn off B.to turn off C.turning off D.turn on
Please don't leave without___the lights.A.turn off B.to turn off C.turning off D.turn on
Please don't leave without___the lights.A.turn off B.to turn off C.turning off D.turn on
C ( without 介词后跟动词ing形式）