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    The farmers on the farm when a UFO flew over their heads. A. worked B. work C. are working D. were working 【查看更多】

     

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    The farmers ________ on the farm when a UFO flew over their heads.

    [     ]

    A. worked
    B. work
    C. are working
    D. were working

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    The farmers ________ on the farm when a UFO flew over their heads.

    [     ]

    A. worked
    B. work
    C. fire working
    D. were working

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    The farmers _________ on the farm when a UFO flew over their heads．

    A．worked                B．work             C．are working               D．were working

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