4. We stayed at home because it rained (heavy)...
III. Reading.
A. Read the passage, then answer the questions below. (2ms)
Everyone wants to reduce pollution. But the pollution problem is very complicated. It is complicated
because much pollution is caused by things benefit people. For example, exhaust from automobiles causes large
percentage to air pollution. But the automobiles provide transportation to millions of people. Factories discharge
much of the material that pollutes air and water but factories give employment to a large number of people.
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