Đề thi tuyển sinh lớp 10 năm 2018 môn Tiếng Anh (Đề 9)

Air pollution, or dirty air, is (1).......................by many things. Great clouds of smoke come from (2)..........................chimneys. Cars send smoke and fumes into the air. Burning waste fills the air (3)...........................bits of dirt. Even burning leaves add smoke to the air. Smoke of all kinds is bad to breathe and can do great harm to the body. Many countries have made laws to limit the amount of fumes cars can exhaust into the air. They also set limits on pollution from power plants and factories. (4).........................scientists have not yet been able to stop air pollution, they have found ways to make cars and factories burn fuel more cleanly. People are also more careful than they once were. For example, they have stopped burning fallen leaves in the autumn. We still have a long way to go. But if we all work together we can (5)..........................the problem.