I

Australia is (1) the sixth largest country in the world . However , less (2) than 20 million people live there . The first people in Australia were Aborigines , but today they are only 1.5% of all Australians . Most (3) of the people are descendents of British (4) settlers . In recent years a lot of people have come from other European countries and from Asia . Australia is a rich country . (5) Its farms meat , fruit , vegetables , wool , cereals and wine . There are lots of mines , too .

II

1. Are there two or three main kinds of pollution?

1 There are three main kinds of pollution

3. Which countries are the world leaders in air pollution emissions?

3 China, the USA, Russia, India, Mexico, and Japan are the world leaders in air pollution emissions

4. Is sewage in drinking water another cause of water pollution?

4 Yes it is

5. Why can people living next to a building site where there is too much noise become sick?

5 Because they can not sleep or relax

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