Think before you______the tap______. Do you really need the water?

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问题 Think before you______the tap______. Do you really need the water?

选项 A、turn... down
B、turn... off
C、turn. .. out
D、turn... on

答案D

解析 句意:在你开水龙头前要三思,要考虑一下你是不是真的要用水。turn…on打开(水、电视、收音机、灯、煤气等)。turn…down(把音量)调低。turn…off关掉…;turn…out生产;证明。
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