第9题: [单项选择]What does the passage mainly discuss A. The increased use of private mail services. B. The development of a government postal system. C. A comparison of urban and rural postal services. D. The history of postage stamps. 参考答案:B 答案解析:主旨题。本文主要讨论什么 A项对于私人邮递服务使用的增加。B项政府邮政系统的发展。C项城市和乡村邮政服务的对比。D项邮票的历史。