Ex2. Choose the correct option A, B, C or D to complete the sentences. 1. ……………………water is one of the factors that have driven many species to the verge of extinction. A. Contaminating B. contiminate C. Contamination D. contaminated 2. It’s recommended that we become more concerned …………………… the environment around us. A. of B. to C. with D. about 3.The ……………………use of pesticides and herbicides has led to contamination of groundwater in some areas. A. widespread B. occasional C. general D. experimental 4. Air ……………………, together with littering, is causing many problems in our cities today. A. pollute B. pollution C. polluting D. polluted 5. Many people in this city have received medical …………………… for the disease. A. support B. treatment C. help D. assistance 6.The reduction in air pollution was …………………… last year. A. dramma B. dramatise C. dramatically D. dramatic 7. In many poor nations, there are frequent outbreaks of cholera and other diseases because people there untreated water. A. drink B. to drink C. drinking D. drank 8. The road in front of my office is always …………………… when it rains heavily. A. to flood B. flooding C. flood D. flooded 9. Too much carbon dioxide in the atmosphere causes global ………………… A. warm B. warming C. warmly D. warmth 10. It won’t be possible to save the Earth if we don’t take ……………………right now. A. action B. job C. work D. duty