From this story we can learn: sometimes things done out of will may be _______.

A．the old man didn't give his monkey everything
B．the old man made the money do everything
C．the old man often fell asleep during the day
D．he couldn't drive the fly away

A．people use too many man-made materials
B．the pupulation of the world is increasing faster
C．we are producing more cars, trucks and buses
D．we have more and more industry