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    -Who paper in the world? - Cai Lun . A.was invented ;was B.did invented ;was C.invented ;was D.invented;did 【查看更多】

     

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    --- Who ________ paper in the world?

    --- Cai Lun ________.

    [　　]

    A．invented; did
    B．was invented; was
    C．did invent; was
    D．invented; was

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