第11题: [单项选择]Which of the following is NOT a solution to preventing the harm of secondhand smoke A. We should stay away from smokers. B. We should clean the air in buildings. C. We should establish smoke-free area. D. We should lay a ban on tobacco production. 参考答案:D 答案解析:[解析] 文章提到separate from the smokers以及clean the air in the buildings还不足以解决问题,但暗示了这也是解决问题的办法,文章又提到建立smo