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    精英家教网 > 初中英语 > 题目详情
    We should _____ the power when our TV or computer is not used.
    A．turn onB．turn off　　　
    C．turn up 　　D．turn down
    B

    试题分析：句意：我们应该在不用电脑或者电视的时候把他们关掉。A. turn on“打开”；B. turn off“关掉”；   　　　C. turn up“（声音）调大”；D. turn down“（声音）调小”。结合语境，故选B。
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