London has 1 of about 7,000,000. From about 1800 2 World War II, London was the biggest city in the world, but now there are many cities which are 3 bigger. London is famous 4 many things. Tourists come from all over the world 5 famous buildings and hear the famous clock, Big Ben. 6 many cities, London has problems with traffic and 7 . Over 1,000,000 people use the London underground every day, but there are still too many cars on the streets. The air isn't clean, but it is cleaner than it 8 100 years ago. 9 me, the best things about London are the parks. There are five in the city center. But my children's 10 place is Hamleys, the biggest toy shop in the world.