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    ( ) ---What are computers used for by traffic police in your city? --- the traffic running in a better way. A. Helping B. Keeping C. Making 【查看更多】

     

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    —What are computers used for by traffic police in your city?
    —              the traffic running in a better way.
    [     ]
    A. Helping
    B. Keeping
    C. Making
    D. Letting

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