How long is the Great Wall?

How big is New York?

How big is Beijing?

After reading the questions, I'll get them to read the dialogue by themselves, then talk about the answers in teams.

4. Say the answers and learn to say and use the new words and sentences with the help of PPT.

The new words to learn: thousand, more than, kilometre, million.

The new sentences to learn: How long is it? It's more than twenty thousand kilometres long. How big is it? It has got more than eight million people.

Learn to say the new words: "thousand", "more than" and "million" with PPT, learn to say the new word "kilometre" with the sentence "It's more than twenty thousand kilometres long."

At the same time, write down the sentences on the blackboard.

The sentences to write down:

A: How long is it?

B: It's more than twenty thousand kilometres long.

After learning each main sentence, learn to use them with PPT.

The sentences to learn to use:

Tell me more about the... How long / How high is it?

Can you tell me something about...? How big is it? (运用之前强调has got用于表达城市人口数量的用法。)

5. Sum up the function and the grammar of the sentences.