综合填空 Australia is the greatest island in the world. It is much smaller t_____ China. It is in the s_____ of the Earth. So when it is h_____ summer in China, it is cold winter in Australia. Australia is big, but the p________ there is smaller. There are only about 24,000,000 people in Australia. The population of Australiai_____ the same as that of Shanghai, a city in China. Enough laws have been made to f______ against pollution. The cities in Australia have got little air or water pollution. The sky is blue and the water is clear. You can clearly see fish s_______ in the rivers. Plants grow very well. Australia is famousf_____ its sheep and kangaroos. After a short drive from any town, you will findy______ in the middle of white sheep. Sheep, sheep, everywhere are sheep. Have you ever seen a kangaroo? It has a “bag” in its body. The m______ kangaroo keeps its baby kangaroo in the “bag”. It is very interesting, isn’t it ?