阅读理解

　　London has a population of about 7 000 000．From about 1800 until World War Two，London was the biggest city in the world，but now there are many dries which are much bigger．

　　London is famous for many things．Tourists come from all over the world to visit its famous buildings and hear the famous clock，Big Ben．

　　Like many big cities，London has problems with traffic and pollution．

　　Over 1 000 000 people a day use the London underground，but there are still too many Cars on the streets．

　　The air isn't clean．but it is cleaner than it was 100 years ago．

　　For me，the best things about London are the parks．There are five in the city centre．But my children's favorite place is Hamleys，the biggest toyshop in the world!

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