Điền từ vào chỗ trống

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8. They try their best to reduce levels of
9. The bridge
10. Soccer results are often
11. These hills were formed by
pollution. (environment)
fell down. (abrupt)
(predict)
eruption. (volcano)
12. The most
typhoon in 2004 made thousands of people homeless. (disaster)
13. The hotel was
damaged by fire last November. (severe)
14. Volcanic
are dangerous. (erupt)
15. Air
causes many respiratory problems to people. (pollute)
16. Most
are about our poor protection of the environment. (complain)
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