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    31．Fred left the company an hour ago . His work unfinished since . A．left B．was left C．has left D．has been left 【查看更多】

     

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    —Why do you look so worried?

    —Fred left the company half an hour ago. His work _______ unfinished since.

    A．left   B．was left    C．has left     D．has been left

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    －Why do you worried?

    －Fred left the company half an hour ago．His work ________ unfinished since．

    [　　]
    A．

    left

    B．

    leaving

    C．

    has left

    D．

    has been left

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