单项选择题
Australia is a nation of immigrants because the overwhelming majority of the Australian population are（）.
A.white B.middle class people C.tourists from other countries D.immigrants or their descendants
单项选择题 Australia is politically divided into（）states and（）territories.
单项选择题 Why has Australia always been a continent with few people?（）
单项选择题 Aboriginal and Torres Strait Islander people constitute（）of Australia.s population.
