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Before you leave the classroom, please   &nbs

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Before you leave the classroom, please       the lights.
A.turn up B.turn down C.turn on D.turn off
Before you leave the classroom, please   &nbs
D

此题重点考查四个短语的区别,turn up出现,开大;turn down 减小,关掉;turn on 打开; turn off关掉。句意:在你离开房间之前,请把灯关掉。结合语境可知选D。