【題目】We should _____ the power when our TV or computer is not used.

A. turn on B. turn off

C. turn up D. turn down

【答案】B

【解析】試題分析:句意:我們應該在不用電腦或者電視的時候把他們關掉。A. turn on“打開B. turn off“關掉C. turn up“(聲音)調大;D. turn down“(聲音)調小。結合語境,故選B。

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