8. pollution
9. carefully
10. death
VI.
1. Many rivers...poisoned, because...
2. The polluted environment makes birds leave...
3. Plastic bags...waste, so we should...
4. The contaminated food results in peple' s poor heath
5. Due to factories' fumes release,....
VII.
1. will have
2. would be
3. will die
4. would not happen
5. shines
6. stopped
7. reduce, will be
8. did not read, would not know
9. were, would remove
10. will have, listens