A．It makes people mentally ill．
B．It hinders people's improvement．
C．It gives people too much stress．
D．It makes people fail．
A．To help students in finding full-time jobs．
B．To ask more companies to hire college students．
C．To help students fmd part-time jobs．
D．To ask students work in school offices．
A．They have the same pay．
B．They involve working outdoors．
C．They are parts of college courses．
D．They may become hill-time jobs after groduation．