单项选择题
A.Change their jobs. B.Earn more money. C.Reduce their working hours. D.Strengthen the government’s role.
A.Many of them found it difficult to exercise on a plane. B.Many of them were concerned with their well-being. C.Not many of them chose to do what she did. D.Not many of them understood the program.
A.Study for some profession. B.Attend a medical school. C.Stay in business. D.Sell his shop.