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    17．Nobody can learn English well yon work hard on it． A．if B． unless C．when D．but 【查看更多】

     

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    Surfing is too hard ____ me. I’m afraid nobody can learn it

    easily.   

    A．on

    B．with

    C．for

    D．at

     

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    Surfing is too hard ____ me. I’m afraid nobody can learn it
    easily.   
    A．onB．withC．forD．at

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    Nobody can learn English well _____ you work hard on it.
    [     ]
    A. if
    B. unless
    C. when
    D. but

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    Nobody can learn English well _____ he works hard on it.   
    [     ]
    A. if      
    B. when     
    C. but    
    D. unless

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    Nobody can learn English well ________ he works hard on it.

    [     ]

    A. if
    B. when
    C. unless

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