Chọn đáp án đúng:
1. Air pollution is caused_______(1) ill health in human beings. In a lot of countries, there are________(2) limiting the amount of smoke factories can produce although there is not enough_______(3) on the effects of smoke on the atmosphere. Doctors have_______(4) that air pollution causes_______(5) diseases. The cases from the exhaust of cars______(6) also increased air pollution in most cities. The_______(7) of petrol produces a poisonous gas, which is often collected in busy streets circled by high buildings. Children_________(8) in areas where there is a lot of lead in the atmosphere can not think as_______(9) as other children and are clumsy when they______(10) their hands.
(1) A.from B.on C.over D.of
(2) A.laws B.ideas C.problems D.regulations
(3) A.news B.article C.information D.newspaper
(4) A.agreed B.pointed C.disagreed D.proved
(5)A.lung B.heart C. liver D.stomach
(6) A.had B.have C.has D.having
(7) A.water B.lead C.gas D.exhaust
(8) A.lived B.live C.to live D.living
(9) A.quick B.slowly C.quickly D.slow
(10) A.touch B.use C.handle D.collect