听一段材料，回答下面几个小题。How is the students' high school life?
A. Controlled and busy.
B. Regular and colorful.
C. Active and independent.To the speaker, what is the role of outside class activities at university?
A. To make students healthier.
B. To improve students' test scores.
C. To enrich students' experience.What does the speaker advise his students to do?
A. Learn to enjoy themselves.
B. Learn to be their own masters.
C. Learn to develop their potential（潜力）.
