Is Australia the world's largest island and its smallest continent? Actually, it's both. In fact, Australia is the only country that is also a continent. It has a population of about 16.5 million. That makes this island nation one of the least densely populated countries. What ethnic groups make up the Australian population? The majority of Australians are of English, Irish, Greek, Dutch, and Polish. However, over the past 50 years, some four million people from more than 120 countries have made Australia their home. This includes a large number of Asian and African immigrants. Question 29: What does the word "it" in line 2 refer to? A. Australia B. country C. continent D. both B & C are correct Question 30: “That makes this island nation one of the least densely populated countries” means A. This nation has the most population in the world B. This nation is one of the countries that have the least population C. This nation has more population than other countries D. This nation has less population than its neighbors