一、听录音，圈出与所听内容意思相符的图片。
1. A. B.
2. A. B.
3. A. B.
4. A. B.
5. A. B.
6. A. B.

二、用所给单词的适当形式填空。
1. Helen can ______ (use) the plastic bottle ______ (make) a flower.
2. Planting many trees can help us ______ (keep) the air clean.
3. Wood comes from ______ (tree).
4. Don't ______ (waste) too much paper.
5. Everyone should ______ (save) energy.
6. There is not ______ (many) water in ______ (much) places.
7. Do you want ______ (some) glass bottles?
8. You shouldn't ______ (driver) the old car.
9. Can you tell me how ______ (protect) our Earth?
10. I have some paper ______ (bag).

use
; to make
; keep
; trees
; waste
; save
; much
; many
; some
; drive
; to protect
; bags

( ) 1. The oil is ______.
A. use
B. reuse
C. useful

C

( ) 2. To keep the air clean, don't ______ to work every day.
A. walk
B. run
C. drive

C