【正确答案】 B

【答案解析】原文：W：If we can convince the next generation that smoking isn’t “cool”，eventually we might be able to eradicate smoking.M：I suppose you’re right.You can pass all the laws you want but that doesn’t mean people will follow them.People’s attitudes need to change.W：Exactly! In the 1920s they banned alcohol in America, but of course people didn’t stop drinking. Instead, lots of people got sick and even died from drinking industrial alcohol.Question：What should be done to eradicate smoking according to the speakers？题目问根据说话人，我们做什么可以根除吸烟。对话中女士说如果能让下一代人相信吸烟并不“酷”，那么可能最终能够根除吸烟。男士表示，人们需要改变态度。女士表示认同。也就是说,改变人们对吸烟的态度可能根除吸烟。故选B。