短文填空。

     New York, London,Paris and other big cities are exciting places to l     1     in.There are many i     2     things to see and to do. You can go to different k__3   of museums and see plays and films. You can also go to s     4    to buy things from all o      5      the world.

     But there are many problems in big c      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      7       work in a good place to

live i      8      Also,too many people in a small place make it hard to keep the cities safe and clean. So

before peoplehave to move t_    9      big cities,they Should think a      10      the problems of living there.