单项选择题
A．before he got married B．after he won the Nobel Prize for literature C．just before he came to China D．after he wrote many plays
A．fewer cars on the road B．higher insurance rates C．more highway accidents D．more cars on the road
A．Americans need to save gas. B．Gas prices continue to rise. C．Small cars get good gas mileage. D．Automobiles cause serious air pollution.