Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.
Air pollution occurs when wastes dirty the air. People produce most of the (1)........that cause air pollution. Such wastes can be in the form of gases or particles of solid or liquid matter. These substances result chiefly from burning (2).............. to power motor vehicles and to heat buildings. Industrial processes and the (3)...............of garbage also contribute to air pollution. Natural pollutants (impurities) include dust, pollen, soil particles, and naturally occurring gases.
The rapid growth of population and industry and the increasing use of automobiles and airplanes have made air pollution a (4)............. problem. The air we breathe has become so filled with pollutants that it can cause (5)...........problems. Polluted air also harms plants, animals, building materials, and fabrics. In addition, it causes damage by altering the earth’s atmosphere.
(4).................................
Hãy suy nghĩ và trả lời câu hỏi trước khi xem đáp án
Lời giải:
Báo saiSerious (adj): nghiêm trọng (nói về tính chất của vấn đề)
Các đáp án còn lại:
A. good (adj): tốt
B. poison (adj): có độc
C. wonderful (adj): tuyệt vời
Ô nhiễm không khí là một vấn đề nghiêm trọng, các tính từ khác không phù hợp về nghĩa.