10 . Complete the sentences with the given words in their proper forms:

breath,     nature,     fighter,     live,     pollute,     chemistry,     ill,     change

1. Martin Luther King was a humanitarian and social reformer who ________ for African-American civil rights during the 1950s and 1960s.
2. Some factories simply dump waste into the river, which makes water nearby ________.
3. The ________ beauty of my hometown attracts tens of thousands of tourists every year.
4. Xianmen is a ________ city, with many hotels, inns, and interesting tourist attractions.
5. Take a deep ________ if you are too nervous on the stage.
6. The medicine can help cure different ________. Besides, you get it at any ________.
7. Principals ________ their ideas on educational modernization at the end of the last meeting.