An Introduction to AustraliaDo you know Australia? Australia, the largest island in the world, comprises the mainland of the Australia continent, the island of Tasmania(塔斯马尼亚岛)and numerous smaller islands. It is a little smaller than China. It is in the south of the Earth. Australia is big, but its population is not large. The population of Australia is nearly as large as that of Shanghai. Australia ranks highly in many international comparisons of national performance, such as quality of life, health, education, economic freedom, and the protection of civil liberties and political rights.The government has made enough laws to fight pollution. The cities in Australia have got little air or water pollution. The sky is blue and the water is clean. You can clearly see fish swimming in the rivers. Plants grow very well.Last month we visited Perth, the biggest city in Western Australia, and went to a wild flowers' exhibition. There we saw a large number of wild flowers we had never seen before. We had a wonderful time. Perth is famous for its beautiful wild flowers. In spring every year Perth has the wild flowers' exhibition. After visiting Perth, we spent the day in the countryside. We sat down and had a rest near a path at the foot of a hill. It was quiet and we enjoyed ourselves. Suddenly we heard bells ringing at the top of the hill. What we saw made us pick up all our things and run back to the car as quickly as we could. There were about three hundred sheep coming towards us down the path.Australia is famous for its sheep and kangaroos(袋鼠).After a short drive from any town, you will find yourself in the middle of white sheep. Sheep, sheep, everywhere are sheep. The kangaroo is an unofficial symbol of Australia, and appears as an emblem on the Australian coat of arms, on some of its currency, and is used by some of Australia' s well known organizations. The kangaroo is important to both Australian culture and the national image, and consequently there are numerous popular culture references.4.In Perth you may visit a wild flowers' show in ______.