根据短文判断正（T）误（F）。 New York, London, Paris and other big cities are wonderful places to live in. There are many nice things to see and to do. You can go to different places of great interest, plays and films. You can also go shopping to buy things from all over the world. But there are serious problems in big cities, too. The cost of living is high, and there are too many people in some places. Every year many people move to the cities because there are more chances (机会) to find jobs, to study at good schools and receive good medical care (医疗保健). But sometimes these people can't find jobs or good places to live in.Also, too many people in a small place make it hard to keep the cities safe and clean. Some people enjoy staying in big cities, but others do not. Before people move to a big city, they should think about the problems of staying there. (     )1.Big cities are wonderful places to live in. (     )2.You can buy many cheap (便宜的) things in cities. (     )3.Many people go to cities to find jobs. (     )4.There are too many pople in cities, so it is hard to keep the cities safe and clean. (     )5.All the people enjoy staying in big cities.