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

 

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

A．ProtectB．To protectC．ProtectingD．Protected

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