题目内容
阅读并根据短文内容，从短文后的四个选项中选出能填入空白处的最佳选项。
In the countries all over the world, people are leaving the countryside in large numbers to find jobs in the cities．They leave because the countryside is much poorer than the city, and 1 , Services such as hospitals and transport are usually much better in cities than they are in the country．They hope that their lives will improve when they move to the city．
But in the big cities of Europe and America London, Paris, New York, 2 ．These are usually families who have some money, and want to live a quieter life．They are tired of the noise and the dirt(灰尘)of the city, 3 ．They don't want to sit in traffic any more．They want a house with a garden, and clean air that isn't polluted．
So they move out．Some don't go very far, just a little way out of the city, to the towns near the cities, other people move to the real countryside with sheep and cows and green fields! There, they start new lives and try to make new friends．
Not all those who move from the city to the countryside are happy．After two or three years, many people who have done this feel that it was a big mistake．They don't make so much money and there isn't much to do．Country people are very different and aren't always very friendly．
As a result, 4 ．"It's wonderful to see crowds in the streets and cinema lights, "they say, "I'm so glad I'm back in the city! "
