A．Which of them is considered most important
B．Whether it is true love without commitment.
C．When the absence of any one doesn't affect the relationship.
D．How the relationship is to be defined if any one is missing.

A．Social work as a profession.
B．The history of social work.
C．Academic degrees required of social work applicants.
D．The aim of the National Association of Social Workers.

A．They try to change people's social behavior.
B．They help enhance the well-being of the underprivileged.
C．They raise people's awareness of the environment.
D．They create a lot of opportunities for the unemployed.