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

A. turn on   B. turn off    

C. turn up    D. turn down

 

B

【解析】

試題分析:句意:我們應(yīng)該在不用電腦或者電視的時候把他們關(guān)掉。A. turn on“打開”;B. turn off“關(guān)掉”;    C. turn up“(聲音)調(diào)大”;D. turn down“(聲音)調(diào)小”。結(jié)合語境,故選B。

考點:考查動詞短語的辨析。

 

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