III. Find the word which has a different sound in the underlined part.

11.A. washed                  B. worked           C. wanted             D. stopped

12. A. valentine             B. imagine            C. magazine          D. discipline

13. A. question              B. mention           C. education                   D. action

14. A. watches               B. misses              C. goes                 D. brushes

15. Before Nam played  soccer, He had cleaned the floor.

-> After ………………………………………………………………………….

V. Read the passage.

There are three main kinds of pollution: air pollution, water pollution and noise pollution. Air, which is the most important element of our environment for our (19) ……………………, can be polluted in many ways. Smoke in the air from mills, factories and industry (20) …………………… carbon monoxide, carbon dioxide, and methane, which are all poisonous gases. This leads (21)………… health problems like asthma and lung diseases, and the thinning of the ozone layer, which (22)…………………… us from harmful UV ray. China, the USA, Russia, India, Mexico and Japan are the world leaders in air pollution emissions. Water is also polluted by the discharge of commercial and industrial waste. Sewage in drinking water is another (23) …………………… 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 leads to headaches, tension, (24) ……..………… 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 (25) …………………… noise pollution.

Choose the best answer (A, B, C or D).

19. A. survival     B. survive             C. surviving         D. survived

20. A. includes     B. include             C. contains           D. contain

21. A. in               B. into                  C. to                     D. from

22. A. prevents    B. protects           C. avoids              D. hides

23. A. effect          B. cause                C. result               D. consequence

24. A. brain                   B. mind                C. head                 D. mental

25. A. told            B. called               C. said                  D. mentioned