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    He was working quietly, with all his attention on the task. A. was fastened B. fastening C. to fasten D. fastened 【查看更多】

     

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     He was working quietly, with all his attention _______ on the task.

       A. was fastened               B. fastening                  C. to fasten                   D. fastened

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    He was working quietly, with all his attention _______ on the task.

         A．was fastened    B．fastening   C．to fasten   D．fastened

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    He was working quietly, with all his attention ________ on the task．

    [　　]
    A．

    was fastened

    B．

    fastening

    C．

    to fasten

    D．

    fastened

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