题目内容：

短文改错If you walk around in some public places ,you will notice most of smokers are young people
If you walk around in some public places ,you will notice most of smokers are young people and some are still middle school students .It is said that in China the number of people smoking are about 45% .Why do so many people smoke Some think smoking gives themselves pleasure .Some even think that smoking can refresh them.In the fact,smoking is a bad habit that makes great harm to people’s health .Studies of smoking show that many kinds of diseases have anything to do with smoking.Smoking itself is a waste ,that costs one so much money .Besides ,many fires are often causing by careless smokers .Today more and more people all over the world want to give up smoking .

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If you walk around in （去掉）some public places ,you will notice most of smokers are young people and some are still middle school students .It is said that in China the number of people smoking are ...