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    More than two years ago, people knew little about the universe. A. thousands B. thousand C. thousand of D. thousands of 【查看更多】

     

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    More than two _______ years ago, people knew little about the universe.
    [     ]
    A. thousands
    B. thousand
    C. thousand of
    D. thousands of

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    More than two _______years ago, people knew little about the universe.

    A．thousands

    B．thousand

    C．thousands of

    D．thousand of

     

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    More than two ________ years ago, people knew little about the universe.

    A． thousands         B． thousand             C． thousand of                 D． thousands of

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    More than two ________ years ago, people knew little about the universe．

    [　　]

    A．thousands

    B．thousand

    C．thousand of

    D．thousands of

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    More than two ________ years ago, people knew little about the universe．

    [　　]
    A．

    thousands

    B．

    thousand

    C．

    thousand of

    D．

    thousands of

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