第一节：单项填空（共15小题，每小题1分，满分15分）
21. With a ___ number of farmers rushing into cities, jobs can’t be easily found even in some very ___ cities such as Shenzhen and Guangzhou.
A growing, developing B grown, developed
C growing, developed D growing, developed
22. Jack ____ here last night. If he ______ ,he would have phoned me.
A couldn’t come, had come B couldn’t have come, had come
C couldn’t have come, came D mustn’t have come, came
