I. Choose the best answer to complete the following sentences. 1. Our environment is becoming polluted more and more. We have to protect our . a. deforestation b. air pollution c. environment d. water pollution 2. Mr. Brown is talking to some volunteer.. . a. converse b. conservationists c. conversation d. conversationists 3. I don't want anyone to listen... .. a. carelessly b. care c. careless d. careful 4. If we .... hard, we will make this beach a clean and place ......... again. 74
