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    Great changes in our country since twenty years ago. A. have taken place B. have been taken place C. took place 【查看更多】

     

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    Great changes _____ in our country since twenty years ago.
    [     ]
    A. have taken place
    B. have been taken place
    C. took place

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    Great changes ________ in our country since twenty years ago.

    [　　]

    A．have taken place
    B．have been taken place
    C．took place
    D．happened

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    Great changes ________ in our country since twenty years ago.

    [　　]

    A．have taken place
    B．have been taken place
    C．took place
    D．happened

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