UNIT 7
G. READING
I. Read the passage and choose the best answer (A, B, C or D).
There are three main (1) ……………… of pollution: air pollution, water pollution and
noise pollution. Air, which is the most important element of our environment for our (2)
……………………, can be polluted in many ways. Smoke in the air from mills, factories
and industry (3) …………………… carbon, monoxide, carbon dioxide, and methane, which
are all poisonous gases. This leads (4) …………………… health problems like asthma and
lung diseases, and the thinning of the ozone layer, which (5) ……………………us from
harmful UV ray. China, the USA, Russia, India, Mexico and Japan are the world leaders in
air pollution (6) ……………………Water is also polluted by the discharge of commercial
and industrial waste. Sewage in drinking water is another (7) ……………………of water
pollution as it contains germs and viruses. The noise of vehicles, mills, and factories can be
really unbearable. This kind of constant sound also (8) ………………headaches, tension, (9)
……..………… stress and migraines. People living next to a building site where there is too
much noise can become sick, as they cannot sleep or relax. This is (10)……………………
noise pollution.
1. A. types
B. kinds
C. models
D. both A & B
2.
A. survival
B. survive
C. surviving
D. survived
3. A. includes
B. include
C. contains
D. contain
4. A. in
B. into
C. to
D. from
5.
A. prevents
B. protects
C. avoids
D. hides
6.
A. emissions
B. emitted
C. emission
D. emitting
7. A. effect
B. cause
C. result
D. consequence
8. A. causes
B. leads to
C. results in
D. all are correct
9.
A. brain
B. mind
C. head
D. mental
10. A. told
B. called
C. said
D. mentioned
II. Read the passage. Answer the questions below.
Scientists have discovered that the ozone layer is getting thinner. Some predict that the
sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years.
These harmful rays can also damage the eyes, create wrinkles, and cause other health
problems.
The stratosphere contains a form of oxygen called ozone. Ozone is a molecule composed
of three oxygen atoms. The chemical formula of ozone is 03. Oxygen molecules make up
about 21% of all gases in the Earth’s atmosphere. They consist of two atoms of oxygen and
are labeled 02. Most ozone found in our atmosphere is formed by an interaction between
oxygen molecules and ultraviolet radiation (UV) from the sun. When ultraviolet radiation
hits an oxygen molecule, it may cause the molecule to break apart into single atoms of
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