New York, London, Paris and other big cities are exciting places to l【小题1】 in. There are many i【小题2】 things to see and to do. You can go to different k【小题3】 of museums and see plays and films. You can also go to s【小题4】 to buy things from all o【小题5】 the world.

But there are many problems in big c【小题6】, too. There are to many people move to cities to find jobs, and to study at good schools. But sometimes these people can’t f【小题7】 work or a good place to live i【小题8】. Also, too many people in a small place make it hard to keep the cities safe and clean. So before people have to move t【小题9】 big cities, they should think a【小题10】 the problems of living there.