4. Ss act the conversation in pairs. Ask some pairs to act out their conversations.

Step 7 Role-play

1. Ss read the conversations and try to understand the meaning.

2. Read the conversation after the teacher.

3. Practice the conversation with their partner. Then let some pairs to act out the conversation.

4. Explain some new words and main points in the conversation.

(1) guess

e.g. Let us guess the height of the building.

(2) big deal, deal

big deal是固定搭配，表示 "重要的事情或状况"，否定用It's not a big deal或It's no big deal.表示说话人并不认为某事有什么了不起。

e.g. There's a soccer game on TV this evening but I don't have to watch it. It's no big deal. It's a big deal, David, bigger than you know.

What's the big deal? It's only a birthday, not the end of the world.

有什么了不起的？这不过是个生日，又不是世界某日。

(3) work out

work out 解决（问题）；算出

e.g. Mike worked out the difficult problem by himself.

Is it possible to work out the problem?

Homework:

Write three conversations about your problems and your friends' suggestions.

A: I have too many after-school classes.

What could I do?

B: You could ...