Because a circle has no beginning or end, the wedding ring is a symbol of ______ love.

A．deserts
B．deflects
C．detains
D．threw

A．support Alcoholics Anonymous as a means of coping with alcoholism
B．present a learning paradigm that will help alcoholics to understand what causes their dependence upon alcohol
C．explain the application of a psychological approach to alcoholism
D．help researchers to formulate workable hypotheses about the treatment of 'alcoholism