I . Choose the correct potion A,B,C or D 1............... water is one of the factor that have driven many species to the verge of extinction. A.contaminating Bcontaminate C.contamination D.contaminated 2.The ..............use of pesticides and herbicides has led to contaminate of groundwater in some areas A.widespread B.occsionnal C.general D experimental 3.the reduction in air pullution was ...............last year A.dramma B.dramatise C.dramatically D.dramatic 4.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 5.The road in front of my office is always................when it rains heavily A.to flood B.flooding C. flood D.flooded