2. A: Why should trees _______ (plant) on the mountains?

　B: Forests are very important to the world. The wind can ______ (stop )from _____ (blow) the earth away. The sand can ______ (stop ) from______ (move) towards the rich farmland.

　A: We ______ already_________ (plant) about eight thousand trees. Millions of trees may _______ (need) for all the mountains here, you’ll ______ (see) a “Great Green Wall” in a few years’ time.

　B: That’ll be really wonderful.

　C) 根据句意，选择与划线部分意思相同或相近的解释。

1. A: Do you know how to grow cotton?

　B: Yes, more or less.

　A: Can cotton _______ (grow) in water?

　B: No, It’s usually _________ (grow) on the ground.

　A: Can cotton _______ (harvest) once a year?

　B: Yes, It can’t _______ (harvest) twice a year.

10. There’s a n __ t i__ __ on the wall, let’s go and have a look.

　B)用所给动词的适当形式完成下列对话。

9. Tie the tree to the top of a stick to keep it　 st __ __ __ g h t.

8. The Great Green Wall is across the n __ __ t h __ __ __ part of China.

7. He p __ __ n t e d　 to the high mountains far away.

6. There are many mistakes to be c __ r r __ __ __ e d

5. The rain p __ __ v __ __ t e d　 me from going.

4. D r __ __ g __ t　 often happens in this town.

3. Tree can stop the sand from moving towards the rich f__ __m l__ __ d.