Use the correct form of the word given in each sentence.
1.The river has been                 with toxic waste from local factories. (pollute)
2.There are some volunteer                     to help clear up the beach. (conserve)
3.                       ,the habitants were all safe after the earthquake. (fortunate)
4.The drivers have left lots of garbage on the ground after their                 (refresh)
5. Some of passengers on the coach were                  injured in the accident. (serious)
6.Drinking too much wine is                to your health. (harm)
7.A              is a person who is concerned about the natural environment and wants to protect it. (environment)
8. there local authorities have received  many letters of        about  the industrial wastes from that factories .(complain)
9. Don't pump          into seas and rivers or it will pollute them. (sew)
10.I was             that I won the first prize. (amaze)
11. You must write your            form clearly. (apply)
12.  he             as if nothing had happened. (behavior)
13.. If people stop using dynamite for fishing, a lot of sea creatures will be well              (preserve)
14. The air              in our city is worse and worse. (pollute)
15. The environment in our neighborhood needs to be                (conservation)