题目

Urbanization Until relatively recently, the vast majority of human beings lived and died without ever seeing a city. The first city was probably founded no more than 5,500 years ago.   67．  In fact, nearly everyone lived on farms or in tiny rural villages. It was not until the 20th century that Great Britain became the first urban society in history—a society in which the majority of people live in cities and do not farm for a living.      Britain was only the beginning. 68．  The process of urbanization—the migration of people from the countryside to the city—was the r想一想．