A．They are sold when they are relatively new.
B．They might not be well-maintained.
C．They are cheaper than privately owned cars.
D．They have as much wear and tear on them as on privately owned cars.

A．Because they find some work exceedingly dull.
B．Because they find work less painful than idleness.
C．Because they have too much leisure and don’t know how to kill time.
D．Because they have to work as hard as if they were poor.