单项选择题
A.Skillful labor force in the U.S. B.Advanced management method. C.Rich consumers. D.Mass production techniques.
A.better than they expected B.not as good as they wish C.both good and bad D.difficult to understand
A.Modem society only belongs to the young. B.Modem life has brought new problems to the old. C.Today's young people are happier than their parents. D.It is necessary to take better care of the old peopl