根据上下文及所给的首字母或汉语提示，写出所缺的正确形式。（满分10分，每空1分） Smoking is a very bad habit. First of all, Cigarettes are expensive. Smokers have to a lot of money          1. buying them. That is a (浪费) of money.              2. Smoking is bad for smokers’ h . It may be            3. responsible for many d . Even worse, it is harmful      4. to people them. It is said that smoking is one         5. of the ways to ( 引起) cancer. Second, there can be        6. fires can result in a great loss of life                7. and property because of a smoker’s (粗心).            8. , we are teenagers and have no income. We have        9. no right to do that. It will be even worse if we f into   10. bad habits.