Thirty years ago this month,China's leaders launched an economic revolution.___________the door to free market reforms and foreign trade.
8.----I’ve got to go now. ---Must you? I you could stay for dinner with us.
The main cause of HIV / AIDS infection in China is drug abuse, ______ is very serious in Yunnan.
9.With the world changing fast, we have something new with all by ourselves every day.
10. Professor Williams keeps telling his students that the future to the well-educated.