1. know

2. will

3. polluted

4. carelessly

5. collect

6. are

7. unhappy

8. kindly

9. won't buy

10. will

11. published

12. angrily

13. but

14. natural

15. beautiful

16. beautifully

17. pollution

18. doesn't rain

19. suggestion

20. careful.

1. If you know where she lives, please let me ………….(know/ knew/ known/ to know)
2. Unless you understand, I ………..(a/ was/ will/ would) explain it again to you.
3. The air in the city is very ……….(pollute/ pollution/ polluted/ pollutant)
4. The accident happened because of driving………………(careful/ carefully/ careless/ carelessly)

5. he is going to ………………..(collect/ collection/ collective/ collector) all the bags.
6. If they …………….(are/ were/ have/ had) pupils, they must wear uniform.
7. She was …………(happy/ happily/ unhappy/ unhappily) because of her bad result.
8. She has …………..(kind/ kindly/ kindness/ unkind) provided a picnic lunch fo us.
9. We ……………(won’t buy/ wouldn’t buy/ haven’t bought/ didn’t buy) this car if it is expensive.
10. if he is careful, he ……………..(will/ would/ could/ must) get good marks.
11. This newspaper is……………...(publishing/ published/ to publish/ publish)everyday. It’s a daily newspaper.
12. he shouted and looked …………….……(angry/ angrier/ angrily/ anger) at me when I broke the vase.
13. he is tired now ……….(so/ because/ but/ and) he stayed up late watching TV.
14. We are talking about the preservation of …………(natural/ naturally/ nature/ naturalize) resources.
15. We’ll make this beach clean and ………..(beauty/ beautify/ beatiful/ beatifully) again.
16. She sings very ……………..(beaty/ beautify/ beautiful/ beautifully).
17. If the …………(pollution/ pollute/ polluted/ pollute) continues, what will happen?
18. If it …………(doesn’t rain/ didn’t rain/ hadn’t rain/ won’t rain), we’ll go to the movies.
19. A large number of inhabitants have made ……………(suggest/ suggestion/ suggested/ to suggest) on how to protect the
environment.
20. Be ……….(care/ careful/ carefully/ carelessly)! He is looking at oyu.