请根据上面的提示，写一篇题为"Give Up Smoking"的短文，字数约120个。
Give Up Smoking
Smoking is a widespread habit even among school children. The number of young smokers is increasing.
It is reported that over two-fifths of the students in a certain school smoke, and some of them even steal money to buy cigarettes, This is terrible.
As we all know, smoking is harmful to our health. But it's even more harmful to middle school students for it does great harm not only to their health but also to their mind.
Middle school students are future builders of the country. They should spend their time learning what is useful. So it's really time that these young smokers made up their minds to give up smoking.