The passage discusses the gap between teachers and students. Summarize the problems by put

ting the following statements according to the sequence they appear in the passage.

A．Lectures are often very formal and empty.

B．Most of knowledge comes from classrooms or laboratories.

C．Undergraduates are not touched with personal influence of teachers.

D．The life of undergraduates is almost disassociated from intellectual interests.E. Men are always made thoughtful by books.