----- Nội dung ảnh ----- ``` Part V: Choose the most suitable answer A, B, C or D to complete the following passage. Air pollution is caused __________ (1) ill health in human beings. __________ (2) limiting the amount of smoke factories can produce although that __________ (3) on the atmosphere. Doctors have __________ (4) proved that air pollution causes __________ (5) diseases. The gases from the exhausts of cars __________ (6) also increased poisonous gas, which is often collected __________ (7) in a lot of areas where there is a lot of lead in their hands. Children are clumsy when they __________ (8) (9) as other children, and __________ (10) their hands.
