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    Land animals are believed to have sea animals. A. been developed from B. been developed C. developed from D. developed into 【查看更多】

     

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    Land animals are believed to have ________ sea animals.

    [　　]

    A．been developed from
    B．been developed
    C．developed from
    D．developed into

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    Land animals are believed ______ from sea animals.

    A. to have developed  B. to have been developed 

    C. having developed  D. having been developed

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    Land animals are believed ______ from sea animals.

    A．to have developed

    B．to have been developed

    C．having developed

    D．having been developed

     

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    Land animals are believed _________ from sea animals．

    [　　]
    A．

    to have developed

    B．

    to have been developed

    C．

    having developed

    D．

    having been developed

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