When I was very little,I always heard my grandfather coughing.I was four years old and a half when my grandpa suddenly passed away.At that time,I didn't know why my grandpa died.Later,I began to know that grandpa died of lung cancer and it was because my grandpa smoked too much.Because of that,I determined not to smoke when I grow up.From this story,you know how harmful smoking is!However,a tiny bad habit may destroy you whole life.一楼的明显菜鸟