A．A child has to go to school.
B．A child doesn't have enough money.
C．A child is restricted to doing something he wants to do.
D．A child will be punished by parents.
A．Being a child is much happier than being an adult.
B．We should enjoy what each age gives us.
C．Being an adult should take more responsibilities.
D．Being a child is often taken care by others.
A．To keep our eyes lubricated.
B．To show our weakness.
C．To kill some bacteria.
D．To relieve ourselves.