1...... water is one of the factors that have driven many species to the verge of extinction

A.contamination B.contaminate 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.windesspread B. Occasional C. General D.experimental

5.Many people in this city have received medical. ... for the disease

A.support B.treatment C.help D.assistance