47. Some people tend to work only for money，while others believe that people should enjoy what opinion do. Which opinion do you prefer？Explain why？

　　48. Some people tend to study a subject in a very intensive way over a short period of time，while others tend to study a subject constantly over a long period of time. What do you think is a better way of learning？Explain why.

　　49. Should the money invested into a university be used to improve the library or to improve the physical training facilities？What do you think？Why？

　　50. Should the money invested into a university library be used to buy books or to buy computer？What do you think？Why？