Earning so large an amount of money every month, why does he always complain that he has no money to buy his favorite books（）

A．we can have a troubled journey
B．we have enough money to fly in planes
C．we can now travel by super fast trains
D．we can travel by motorcars as well

A．medical care for old people should be left to the doctors
B．old people enjoy a happy life only if they are rich
C．the opinion that we should try every possible means to save old people is doubtful
D．it is always morally right to treat old people and push off death