e.g. The wall is 1.7 metres wide.

Step 5 Listening

1. 1b Listen and complete the sentences.

1) Qomolangma is ______ than any other mountain in the world.

2) The Sahara is ____________ desert in the world.

3) The Caspian Sea is ____________ of all the salt lakes.

4) The Nile is _________ river in the world.

2. 2a Listen and number the facts (1- 4) in the order you hear them.

　2b Listen again and fill in the blanks in 2a with the numbers in the box.

　　　　　6,300 5,000 5,464 300

___ The Yangtze River is about ____ kilometers long and the Yellow River is ___ kilometers long.

___ China has the biggest population in the world. It's a lot bigger than the population of the US.

___ China is over ___ years old. It has a much longer history than the US. The US is not even ___ years old.

___ China is almost as big as the US, but it is the biggest country in Asia.

Step 6 Practice

2c Make conversations in pairs.

Examples

A: Did you know that China if one of the oldest countries in the world?

B: Yes, I did. It's much older than my country.

Step 7 2d Read the conversation and answer the questions:

1) Which is the biggest man-made objects in the world？

2) Which is the most famous part of the Ming Great Wall?

Step 8 Language points and summary

1. Fell free to ask me anything on today's Great Wall tour.

在今天的长城游中，大家尽管问我任何问题，不要拘束。

fell free是英语口语中一个常用表达。若有人让你feel free to do something,