Question IV. Complete the passage with the words in the box, then answer the questions bellow. which them because of from as (1) complicated (2) much pollution is caused by things that benefit (3) automobiles causes a large percentage of all air Everyóne wants to reduce pollution. But pollution problem is as it is serious. It is complicated people. For example, exhaust pollution. But automobiles provide transportation for millions of people. Factories discharge much of the material large number and pesticide are important aids to the growing of crops. Thus, to end or reduce pollution immediately, people would have to stop using many things that benefit people do not want to do that, of course. But pollution can be gradually reduced in several ways. (4) pollutes the air and water, but factories give employment to a (5) people. Too much fertilizer or pesticide can ruin soil, but fertilizers (6). Most the quertions