—90 million people.

A：Hello! My name is Li Lei. Welcome to our school!

B：Thank you. I'm Tony.

A：Where are you from?

B：I'm from Australia．

A：

B： I live in Sydney.

A：Where is it?

B：

A：Is it bigger than Canberra, the capital of Australia?

B：Yes, it is.

A：

B：It is a big city with about 4. 2 million people.

A：

B：Sydney Opera House(悉尼歌剧院).

A：Oh, I see.

    In a map of the world you can easily find two big cities, London and New York. London is the oldest city in Britain. It's certainly the biggest city in Europe(欧洲).New York is as big as London, if not bigger. The streets in London are crowded and there is one of the world's biggest underground railway systems(地铁系统). The streets in New York are just as crowded as in London. And the New York subway carries more people each day than the London underground. There are a lot of big stores in these two cities. But New York has more supermarkets than London.

    In London there are many palaces (宫殿)and churches, for example , St.Paul's. New York isn't as old as London, and it hasn't many old buildings. But New York has more skyscrapers(摩天大楼), and they are much bigger than the buildings in London.

    London has more parks than New York .But New York's Central Park is much bigger than the biggest park in London.

A: Hi, Tim. A nice day today, right?

B: Yes, it's much cooler than yesterday.

A: Pretty good. I went to my hometown. It changed a lot.

B: Tell me more about it, please.

A:

B: What else?

A:

B: What about the streets?

A:  There were few cars in the past. But now many families have their cars.

B: Are there any famous places in your home town?

A: Many tourists go there every year.

B: That's great. I'd like to go there one day. Can I go with you?

A: Of course. Welcome to my home town.

B: Thank you.