阅读下面短文，然后根据短文内容从短文后各题所给的选项中选择能填入相应空白处的最佳选项，并在答题卡的相应位置将其涂黑。

    In our daily life, some people think that smoking 1 help them relax. In fact, smoking is really 2. Do you know that there 3 over 4,000 chemicals in cigarettes? These chemicals

    are 4 for our bodies. They can cause cancer and 5 diseases.

    The smoke from cigarettes harms 6 smokers but also other people. It's7 “second-hand smoke” and it can be 8 and has higher risks. Smokers shouldn't use smoking 9 them relax. They must give up 10 as soon as possible.