A. Choose the best answer (A, B, C or D) for each gap to complete the passage. (1.5 pts.)

    If you live in a city, you (1) ______ see many people, hear the noise of traffic, and smell the pollution (2) ______ cars and factories. We are living in a new era in the history of the world. Before this, most people were farmers. They lived in small communities in the (3) ______. Nowadays, many people leave the farms and move into the cities. They look for better jobs. As a result, the cities are growing very quickly. Most cities are becoming more crowded. People are eating more food, using more water, making more garbage, and (4) ______ more things in factories than ever before. Life in modern cities can bring many opportunities, but also many difficulties.

    The authorities are trying to build new roads, new houses, look for more water sources, and limit growth in certain areas. But people are still crowding into the cities (5) ______ than the cities can take them. The cities are (6) ______ out of space. There are no easy answers to this problem.