Smile,is the most basic human action.It symbolize a beautiful,a kind,the person who smile is the most lovely one.A smile can drive the bitter cold,bring warm.If you smile to others,others will smile to you,that is also a communication.If you often keep smiling,you will make more friends,you can get more respect from others.

   Here are some sayings about smile,such as:Laughter is the best medicine;A smile is a best card;Laughter is the privilege mankind etc.so,keep smiling,keep good mood.