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    24、From the photographs ______ from the satellites, scientists are learning things about the earth they have never known before.

    A. to sent              B. to be send          C. sending                    D. sent

    24、D

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    From the photographs ______ from the satellites, scientists are learning things about the earth they have never known before.

    A. to sent              B. to be send          C. sending                    D. sent

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