1. Read the conversations and answer the questions:

1) What will the future be like in the book?

　 2) What can people do?

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

be in great danger, move to other planets; play a part;

3. Read the conversation after the teacher.

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

Homework:

1. Recite the conversation in 2d after school.

2. 用下列词组来造句：

(1) be more crowded and polluted (2) be fewer trees

(3) be in great danger (4) on the earth

(5) less water (6) playa part

板书设计：

Section A2 (Grammar Focus-3c)

Ⅰ. Warming- up and revision

1. Have a dictation of the new words learned in the last class.