What do the scarce elite degrees mean to parents

A．Let him win a tennis game.
B．Help him finish his project.
C．Give him some medicine for his stomach.
D．Go to the library with him.

A．Public Buses are fast and cheap transportation tools.
B．Parking is becoming a big problem.
C．Subway trains are even safer than taxies.
D．Taxies are more convenient than buses.