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    26．So many natural disasters are believed over the recent years because of the frequent unreasonable mankind activities. A．to have come about B．to come about C．coming about D．to be coming about 【查看更多】

     

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    So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.


    1. A.
      to have come about
    2. B.
      to come about
    3. C.
      coming about
    4. D.
      to be coming about

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    So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.

           A．to have come about  B．to come about

           C．coming about          D．to be coming about

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    So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.

    A．to have come aboutB．to come about
    C．coming aboutD．to be coming about

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    So many natural disasters are believed ________ over the recent years because of the frequent unreasonable mankind activities．

    [　　]
    A．

    to have come about

    B．

    to come about

    C．

    coming about

    D．

    to be coming about

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