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    Now many children like surfing the Internet, but the same time they should know that there is something unhealthy on it. A. for; in B. at; by C. on; at D. in; on 【查看更多】

     

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    Now many children like surfing ___________the Internet, but ___________ the same time they should know that there is something unhealthy on it.

    [　　]

    A．for; in

    B．at; by

    C．on; at

    D．in; on

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    Now many children like surfing on the Internet, but ________ the same time they should know that there is something unhealthy on it．


    1. A.
      in
    2. B.
      by
    3. C.
      at
    4. D.
      on

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    Now many children like surfing　________ _________　the Internet,　but　________　the same time they should know that there is something unhealthy on it.

    　　A. for;in　　B. at;by　　C. on;at　　D. in;on

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    Now many children like surfing on the Internet, but ________ the same time they should know that there is something unhealthy on it.

    [　　]

    A．in

    B．by

    C．at

    D．on

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    Now many children like surfing on the Internet, but ________ the same time they should know that there is something unhealthy on it.

    [　　]

    A．in

    B．by

    C．at

    D．on

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