Exercise:want to correct THANKS As the saying goes:Learning is a daily experience and a lifetime mission.We've been leraning since we are born.When you were a baby,it was enough to have the ability to look after yourself.As time goes by,you are demanded to learn more thngs like math,geography and so on.There are some people to teach you how to do and to correct you when you make mistakes. But if you are old enough to feed yourself,there are no people wathching at you any more.The most important thing is to learn every thing by yourself.How to get along well with each other may be the most difficult one.No one can give you a right answer like teachers. So please keeo modest forever, every thing can be your teacher.