To begin with,extracurricular activities enable us to build a strong body .As the proverb says,all work and no play makes Jack a dull boy.Without good health ,we cannot impove our study efficiency and make great achievements in academic studies.on the other hand,outside-class activities help us to develop teamwork spirit.students should not spend the whole day on academic studies.It is very crucial for us to get along and coorperate well with others in a group.