Answers

2014-09-24T17:40:53+08:00
1. voice
2. time
3. campfire
4. clouds
5. CFCs (Chlorofluorocarbons)
6. atmostphere
7. star
8. hydrogen
9. rain
10. planets
11. fire
12.water
13. thunderstorm
14.carbondioxide
15. oxygen
16. sulfur oxide
17. shadow
18. bacteria
19. wind
20. air
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