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Part 7: Four sentences have been removed from the passage. Choose from the sentences A-E the one
which fits each gap. (1,0 m)
A. Industrial processes and the burning of garbage also contribute to air pollution.
B. They include dust, pollen, soil particles, and naturally occurring gases.
C. Such wastes can be in the form of gases or particles of solid or liquid matter.
D. Air pollution threatens the health of the people who live in cities.
E. The air we breathe has become so filled with pollutants that it can cause health problems.
Air pollution occurs when wastes dirty the air. People produce most of the wastes that cause air
These substances result chiefly from burning fuel to power motor vehicles
Besides, there are other polluting substances that exist naturally
The rapid growth of population and industry and the increasing use of
It also harms
pollution. (29)
and to heat buildings. (30)
in the air. (31)
automobiles and airplanes have made air pollution a serious problem. (32)
plants, animals, building materials, and fabrics.