—We should ____________ the light when we leave the room.—Yes. We must learn how

题干

—We should ____________ the light when we leave the room.
—Yes. We must learn how to save electricity.

A．turn up

B．turn on

C．turn off

D．turn down

上一题下一题 0.4难度单选题更新时间:2017-10-01 12:13:54

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