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    ( ) Travelling by air may be ,but not so A. quicker, cheaper B. more quickly, cheap C. quicker, cheap D. more quickly, cheaper 【查看更多】

     

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    Travelling by air may be ________ , but not so ________ .

    [　　]

    A．quicker; cheaper

    B．more quickly; cheap

    C．quicker; cheap

    D．more quickly; cheaper

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