2a Listen and number the facts  in the order you hear them.
Hi, I'm Mike. I'm from the United States.
Welcome to our class, Mike.
We're happy to meet you.
Can you tell me a bit more about China?
Sure! Did you know that China is one of the oldest countries in the world?
It's over 5, 000 years old.
Yes, I did.
It's much older than my country—
in fact, the United States is one of the youngest countries in the world.
It's not even 300 years old.
And China has the biggest population, too.
It's a lot bigger than the population of the United States.
But China is about the same size as the US, right?
Yes, and it's the biggest country in Asia.
We also have some famous rivers.
The Yangtze River is the longest river in Asia.
It's about 6, 300 kilometers long.
Wow! I didn't know that.
I thought the Yellow River was longer.
No, the Yellow River is 5, 464 kilometers long.
But both rivers are very important to China.
2b Listen again and fill in the blanks in 2a with the numbers in the box.
Hi, I'm Mike. I'm from the United States.
Welcome to our class, Mike.
We're happy to meet you.
Can you tell me a bit more about China?
Sure! Did you know that China is one of the oldest countries in the world?
It's over 5, 000 years old.
Yes, I did.
It's much older than my country?
in fact, the United States is one of the youngest countries in the world.
It's not even 300 years old.
And China has the biggest population, too.
It's a lot bigger than the population of the United States.
But China is about the same size as the US, right?
Yes, and it's the biggest country in Asia.
We also have some famous rivers.
The Yangtze River is the longest river in Asia.
It's about 6, 300 kilometers long.
Wow! I didn't know that.
I thought the Yellow River was longer.
No, the Yellow River is 5, 464 kilometers long.
But both rivers are very important to China.
2d Role-play the conversation.
Feel free to ask me anything on today's Great Wall tour.
How long is the wall?
Ah, the most popular question!
If we're only talking about the parts from the Ming Dynasty, it's about 8, 850 kilometers long.
This makes it the longest wall in the world.
Wow, that's amazing!
Why did the ancient emperors build the wall?
The main reason was to protect their part of the country.
As you can see, it's quite tall and wide.
As far as I know, there are no man-made objects as big as this.
Is Badaling part of the Ming Great Wall?
Yes, it's the most famous part.