Ⅳ.根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

　　__1__ There are many reasons that support this point of view, but today I want to concentrate on three reasons.

　　Firstly, smoking is harmful for non－smokers. __2__ Obviously, if people smoke in public places, non－smokers have no choice but to become secondhand smokers. Don't non－smokers have the right to choose not to be secondhand smokers?

　　Secondly, smoking is a cause of pollution. There is a lot of research that shows that many kinds of gases released by smoking are harmful for the environment, such as tar and carbon dioxide. Everyone knows that now the environment is getting worse and worse. __3__

　　Lastly, smokers have other ways to receive nicotine. Nowadays, we have many ways to receive nicotine, such as nicotine gum and nicotine patches. __4__ Do you really want people to smoke in public places instead of using

　　these new products?

　　__5__ And I also think that maybe this is the time for people to quit smoking. Banning smoking is not just for us, but for this world and for everyone who has to live in this world after us.

　　A．In Brief, smoking does great harm to people's health.

　　B．Smokers can use these products instead of smoking.

　　C．Smokers should have the right to smoke, but it's not reasonable if that right is harmful to others.

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