Câu 45: How long did their visit last?
A. Three days B. Four days C. Five days D. Seven days
* Fill in each numbered blank with one suitable word or phrase.
Environmental pollution is a term that (46)...to all the ways by which man pollutes his
surroundings. Man dirties their air with gases and smoke, poisons, the water with chemicals other substances,
and damages the soil with (47) ... many fertilizers and pesticides. Man also pollutes his
surroundings in various other ways. (48)..., people ruin natural beauty by disposing garbage and
waste products on the land and in the water. They operate machines and motor vehicles that fill the air with
disturbing noise. Badly polluted air can cause illness and even death. Polluted water kills fish and other
(49) ... life. Pollution soil reduces the amount of land that is (50)... for growing food.
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