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    28． our earth, or it will be no longer fit for us to live on. A．Protect B．To protect C．Protecting D．Protected 【查看更多】

     

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    ________our earth, or it will be no longer fit for us to live on

    [　　]

    A．Protect

    B．To protect

    C．Protecting

    D．Protected

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          our earth, or else it will be no longer fit for us to live on.

    A．Protect

    B．To protect

    C．Protecting

    D．Protected

     

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          our earth, or else it will be no longer fit for us to live on.


    1. A.
      Protect
    2. B.
      To protect
    3. C.
      Protecting
    4. D.
      Protected

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             our earth, or else it will be no longer fit for us to live on.

    A．Protected         B．To protect         C．Protecting         D．Protect

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            our earth, or else it will be no longer fit for us to live on.

       A. Protect      B. To protect      C. Protecting       D. Protected                                                                                                                                                                                                                                 

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