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    --- Would you like to have a cigarette? --- No, thanks. It is three years since I . A. began to smoke B. smoked C. began to not smoke D. had smoked 【查看更多】

     

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     ---Would you like to have a cigarette?

    ---No, thanks. It is three years since I _______.

    A. have begun to smoke           B. smoked

    C. began to not smoke             D. had smoked

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