Having enough reason to support your choice is essential in TOEFL writing. Here I listed some good reasons for a point as a sample. ( more will be added here)

　　50. Library: Computer V.S. Books
　　Computer:
　　For: 1) Efficiency
　　2) Large storage capacity
　　3) Multimedia attraction
　　4) Management
　　5) Sharing information
　　6) Network or Internet
　　7) Rapid updating
　　Against:
　　1) Harmful Radiation
　　2) Need basic knowledge to operate
　　3) Not easy to carry
　　4) Need consumption of energy.

　　Books:
　　For: 1) Traditional medium
　　2) Easy to carry
　　3) Conveniently read
　　4) Price per copy is more affordable
　　5) index of academic environment

　　Against:
　　1) Not durable
　　2) Low rate of updating
　　3) Can't be shared by any people

　　49 University: library V.S. Physical training facilities
　　Library:
　　For:
　　1) Major goal to impart knowledge to students
　　2) Index of academic environment
　　3) Attract more excellent professors

　　Physical Training:
　　1) Help to improve one's health which is basis of study
　　2) Students learn to be cooperative
　　3) Provide relaxation
　　4) May produce good athletes