1. Smoking is bad for your health.

2. It’s wellknown that smoking is bad for our health. It does much harm to our lung. Smoking too much is very easy to get cancer, which is very terrible. Besides, smoking also do harm to people’s teeth.

3. Those people always smoke will damage their teeth and their teeth are always yellow. That makes others feel sick.

4. The last but not least, the people smoke the passive smoking are tend to get sick. They have done nothing wrong, but stand beside those smoking people. It’s unfair.

5. So, in order to the health of everyone, please stop smoking.

6. Smoking is not allowed in the library.

7. You may smoke in the lounge if you’d like.

8. Smoking is a bad habit that does harm to smoker and others. Many kinds of diseases and cancers are caused by smoking, such as tracheitis, lung cancer and many other diseases.

9. Smoking is harmful.

这些句子涵盖了吸烟对健康的危害、吸烟在公共场所的限制以及吸烟对个人和社会的影响等方面。