If you wanted my advice, I wouldn’t buy a new house here

Air (23)…………..is caused of ill-health in human beings. In a lot of countries, there are laws limiting the amount of smoke which factories can (24)…………..although there is not enough information on the effects of smoke on the atmosphere. Doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars also (25)………….. air pollution in most cities. The lead in petrol produces a poisonous gas, which is often (26)…………..in busy streets circled by buildings. Children who live in areas where there is  (27)…………..lead in the atmosphere cannot think as quickly as other children, and are clumsy when they use their hands.

The bamboo used to make conical hats must be split into very thin strings and then put into water…………...they can avoid tearing and any breakage.

I’m usually right about the weather, am not I?

.…………..is the act of cutting down or burning the trees in an area.

Mark the letter to indicate the word whose underlined part differs from the others in the position of primary stress.

Read the passage and choose the best answer.

Thousands of years before Columbus came to the New World, the American Indians entered North America by crossing a narrow strip of land that once connected Alaska and Siberia. The migrants entered a new world in which there were no people at all. But there were many animals to hunt, and there were forests where nuts, roots, and berries could be gathered.

When the Europeans came to the New World, the Indians, at first, taught the settlers how to plant corn, bake fish, make canoes, and smoke tobacco. In return, the white introduced horses, guns, gunpowder, and alcohol. But at last, there were struggles for land, and the struggles could have only one result – war. When the wars were over, all Indians were moved to large tracts of land called reservations. Now, some of them, embittered by mistreatment, are determined to preserve their tribal life; some wish to modernize the reservations. These alternatives, with many variations, are what most Indians have chosen – a future in modern technology and education, or the revival of ancient tradition and treaties.

The Indians entered North America