题目内容：

    In the countries all over the world, people are leaving the countryside in huge numbers to find jobs in the cities. They leave ______ the countryside is much poorer than the city, and often there isn’t much ______ there. Services such as hospitals and transport are usually much better in cities than they are in the country. They hope that their lives will ______ after they move to the city.

______ in the big cities of Europe and America — London, Paris and New York, people are moving out of the city. These are usually families who have some money, and want to live a ______ life. They are tired of the noise and the dirt of the city, tired of the crowded streets, crowded trains and buses. They want a house with a garden, and clean air that isn’t ______. So they move out.

In fact not all those who move from the city to the countryside are ______. After two or three years, many people who have done this feel that it was a big ______. They don’t make so much money and there isn’t much to do.

As a ______, quite a lot of people who have moved to the countryside move back to the city. “It’s wonderful to see crowds in the streets and cinema lights,” they say. “I’m so glad I’m ______ in the city!”

1.A. so B. if C. until D. because

2.A. work B. space C. progress D. food

3.A. raise B. improve C. end D. spread

4.A. And B. Instead C. But D. So

5.A. safer B. quieter C. fresher D. noisier

6.A. polluted B. influenced C. invented D. wasted

7.A. happy B. sad C. tired D. interesting

8.A. surprise B. idea C. moment D. mistake

9.A. matter B. fact C. result D. example

10.A. sure B. back C. off D. away