A.He is a psychology professor with much knowledge.
B.His views during arguments are very powerful.
C.He may be able to add information to a research paper.
D.He has personal experience in this field.


A.He rejects labeling criminals.
B.He thinks criminals have certain psychological problems.
C.He thinks criminals are abnormal,
D.He thinks that criminals are crazy.
A.In the student recreation center.
B.In the campus dining hall.
C.In the university bookstore.
D.In a classroom.
A.studying.
B.preparing snacks.
C.playing cards.
D.learning how to play bridge.