Word forms:

1. polluted

2. conservation

3. kindly

4. consumers

5. excitement

6. polluted

7. careful

8. carefully

9. amazing

10. consumers

11. happiness

12. cloudly

13. happily

14. unpolluted

15. excitement

Rewrite: 

16. Shall we have dinner at that restaurant?

17. How about playing badminton?

18. Why don't we make a poster on energy-saving?

19. They suggested us that we leave the place at once.

20. She suggested that they sing a song.

lll. 1. polluted 2. conservation 3. kindly 4. consumers 5. excitement 6. polluted 7. careful 8. carefully          9. amazing 10. consumers 11. happily 12.cloudy 13. happily 13. unpolluted 14. excitement

lV. 1. Shall we have dinner at that restaurant?

2. How about playing badminton 

3. Why don't we make a poster on saving energy

4. They suggested that we should leave the place at once

5. She suggests that we should sing a song 

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