1. (2019八下·德惠月考) 阅读下列短文，回答问题。

    London has a population of over 7000000. From about the year 1800 until World War Ⅱ, London was the biggest city in the world. But now there are many cities which are much bigger than it. 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 which stop the city from developing. Over one million (百万) people a day use the London underground, but there are still too many cars on the streets. The air isn't clear, but it is anyhow (不管怎样) cleaner than it was 100 years ago. For me, the best things about London are the parks. There are five in the city center. But my children's favorite place is Hamleys, the biggest toy shop in the world.

1. （1） When was London the biggest city in the world?

   A . In 1750. B . In 1850. C . In 1990. D . In the 21st century.
3. （2） What is Big Ben in London?

   A . It is a toy shop. B . It is a park. C . It is a clock. D . It is a museum.
5. （3） What is the Chinese for "underground" in the passage?

   A . 隧道 B . 地铁
7. （4） How many people use the London underground every day?

   A . Over half of its population. B . Over 100, 000 C . Over three quarters of its population. D . Over 1, 000, 000
9. （5） How was the air in London 100 years ago?

   A . It was much cleaner than it is now. B . It was the same it is now. C . It was the cleanest in the history of London. D . It was not as clean as it is now.