Long before,there was a man called Liu bei ,he ever said :" one should not do bad things,even they are small cakes.”
For us students,in ordinary time,we should not be have dad behavior（习惯）:call the name of class,do not finish homework ,sel-fish（自私）,do anything have nothing to do with(有关于） study etc（等等）
we should be a good student,from now on(从现在开始）