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【题目】We should save energy by _________ the lights when we leave a room.
A.getting off
B.showing off
C.taking off
D.turning off

【答案】D
【解析】句意:我们应该通过离开房间时关灯来节能。get off下车;show off炫耀;take off起飞;turn off关上;根据save energy可知要节能,应在离开房间时关灯,turn off the lights关灯,故选D。

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