二．完型填空。
World Post Day is on October9. This day is the date 1 the Universal Postal Union (UPU) was started in 1874 in Bern, Switzerland.
Post is one of the 2 ways of communication. It is part of people's everyday life all over the world. People send or get letters and things through the post office.
Do you know that China was one of the 3 countries to have a post office? We are not sure about the date, but it is true that there were post offices 4 the Qin Dynasty (221BC-207BC).
Some people think that there might be post offices before then.
