Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks
AIR POLLUTION
Air pollution is a cause of ill-health in human beings. In a lot of countries, there are laws limiting the amount of smoke which factories can produce. (19) _______ there isn't enough information on the effects of smoke in the atmosphere, doctors have proved that air pollution (20) _______ lung diseases.
The gases from the exhausts of car have also increased air pollution in most cities. The lead in petrol produces a (21) _______ gas which often collects in busy streets surrounded by high buildings. Children (22) _______ live in areas where there is a lot of lead in the atmosphere cannot think as quickly as other children and are clumsy when they use their hands.
There are other long-term effects of pollution. If the gases in the atmosphere continue to increase, the earth's climate may become warmer. A lot of the ice near the Pole may melt and may cause serious (23) _______.
1
19.A.However
B. Although
C. Therefore
D. Because
2
20.A. gets
B. does
C. makes
D. causes
3
21.A. dead
B. powerful
C. poisonous
D. harmless
4
22.A. when
B. which
C. where
D. who
5
23.A. flood
B. storm
C. earthquake
D. volcano
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Sinh Học lớp 12
