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    32． at the office, Mr. Green found the papers prepared for his boss were left at home． A．To arrive B．On arriving C．As arriving D．While arrived 【查看更多】

     

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    ________ at the office, Mr．Green found the papers prepared for his boss were left at home．

    [　　]

    A．To arrive

    B．On arriving

    C．As arriving

    D．While arrived

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