A．Because they had no drive and ambition.
B．Because they had no electric lighting.
C．Because they had the best sleep habits.
D．Because they had nothing to do in the evening.

A．Not only teachers but also parents are responsible for the career education.
B．In high school, students know more specific information about occupations.
C．Career education may be in classrooms, small groups, or individual sessions.
D．Teachers use a variety of methods to provide career education, including films.