2. Learn some ways of expressing comparative situations:

(1)The air is fresher.

(2)The hens are much/a little smaller than the cows/geese.

(3)The mice are the smallest of all.

(4)Michael thinks dogs are much more clever than cats.

1. Learn some new words and expressions:

countryside, clear, nature, thin, cow, horse, hen, sheep, goose

Ⅲ.

　 Rainforests cover 6% of the earth’s surface. Rainforests are very important to us. They are the lungs of the earth. The plants in the forests help to make the air fresher and cleaner. They also help to control the weather. They give us wood, rubber, fruit and medicine. We need rainforests so much. But now rainforests are becoming much smaller than before. So we should protect them well.

10. A: Where’s Xiao Ling?

B: She can’t come. She has to do her homework.

A: Does she usually help her mother with the washing?

B: Yes, she does.

Q: Why can’t Xiao Ling come?

9. A: Hi, Mike! Can you go swimming with us?

B: I’m afraid I can’t. I have to tidy my room.

Q: What does Mike have to do?

8. A: Excuse me, is this your pen, Jim?

B: Let me see. Oh, yes, it’s mine.

A: I found it under the chair on the floor. You must look after your things. Here you are.

B: Thank you very much.

Q: What does Jim have to do?

7. A: What problem does Mrs. Brown have about her health?

B: The doctor said she was eating too much. It means Mrs. Brown is too fat.

Q: What does she have to do if she wants to be thinner?

6. A: Listen! I’m sure there may be some dangerous animals on this mountain.

B: Don’t be afraid! We are safe.

Q: Why is she feeling a little afraid?

5. What were you doing when I knocked at the door last night?

II.

4. Do you think you will have a car in 5 years?