I. Read the following passage and put a word in the box in each of the numbered blanks.
busy – exhausts – proved– quickly – In |
Air pollution is caused of ill health in human beings. (1) __________a lot of countries, there are laws limiting the amount of smoke which factories can produce. Doctors have (2) __________ that air pollution causes lung diseases.
The gases from the (3) __________ of cars have also increased air pollution in most cities. The lead in petrol produces a poisonous gas, which is often collected in (4) __________ streets circled by high buildings. Children who live in areas where there is a lot of lead in the atmosphere can not think as (5) __________ as other children, and are clumsy when they use their hands.
1.______________ 2. ______________ 3 .______________ 4.______________ 5.______________
