Dear editor, I'm a middle school teacher I'm worried about the in-creasing number of students who smoke in schools. Two years ago,only about 15 percent of the boys smoked. Today 55 percent do,even a few girls smoke,too. 

As is well known,smoking does great harm to our health. Facts have shown that many serious diseases,such as lung cancer heart disease, are connected with smoking. When one smokes in public places,harm is done not only to hiraself but also to all the people around. if one smokes,he'll have to spend a lot of mon-ey on it. 

So I wish to give the students a piece of advice: give up smoking keep yourselves healthy. 

Yours tndy, 

Zhao Ming