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    People have always been corious how living things on the earth exactly began. A.in B.at C.of D.about 【查看更多】

     

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    People have always been corious           how living things on the earth exactly began.

    A.in                              B.at                               C.of                              D.about

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    People have always been corious________how living things on the earth exactly began.

    [　　]

    A．in

    B．at

    C．of

    D．about

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