II. Put the words in brackets in the correct form:
6. Cutting down trees causes a lot of (environment)_________ damage. *


7. I ( not meet)_____________ them in the street last Sunday. *


8. (Poison)____________chemicals will cause our plannet to become uninhabitable. *


9. He said that water (be)__________too contaminated to be used. *


10. The evacuation (complete)_________3 hours before the storm hit the village.