[解析]
(1)段落大意题。根据第一段Australia is proud of a unique history that has been shaped by the diversity of her inhabitants.The three main elements that have been central to the creation of Australia's population composition are the diversity of her native population,colonization by the British in the past and the extensive immigration from diverse cultures.(澳大利亚以其独特的历史而自豪,这一历史是由其居民的多样性塑造的。形成澳大利亚人口构成的三个主要因素是:本土人口的多样性、过去英国人的殖民统治以及来自不同文化的大量移民。)可知,该段主要讲述了澳大利亚人口结构的三个主要构成要素:原住民的多样性、英国过去的殖民以及来自不同文化的大量移民。因此,第一段主要讲述的是澳大利亚的人口结构。故选D。
(2)词句猜测题。根据划线词所在句子Australia is home to the world's cultures and inhabitants who can identify with more than 270 ancestries (祖先).From the year 1945,the number of people who have immigrated to Australia from different parts of the globe is approximately seven million.The country considers the rich cultural diversity as its main strength which embodiesits national identity.(澳大利亚是世界文化和居民的家园,他们可以认同超过270个祖先。自1945年以来,从世界各地移民到澳大利亚的人数约为700万。国家认为丰富的文化多样性是其主要优势,这embodies其民族身份。)可知,从世界各地移民到澳大利亚的人数众多,导致了其文化多样性,同时体现了其民族身份,embodies在这里的意思是"体现"或"代表"。A.Maintains保持;B.Represents代表;C.Assesses评估;D.Predicts预测。故选B。
(3)细节理解题。根据第四段On a range of measures,Australia is a multicultural success story.On educational attainment,studies show that children of immigrants in Australia get better average results than children of native﹣born Australians.(从一系列衡量标准来看,澳大利亚是一个多元文化的成功故事。在教育成就方面,研究表明,澳大利亚移民子女的平均成绩优于本土出生的澳大利亚人子女。)可知,澳大利亚教育成功的体现是移民子女更好的学习成绩。故选D。
(4)细节理解题。根据最后一段The success in educational performance is mirrored in the broader economy of Australia as it attracts a significant proportion of skilled migrants annually who have a high labour market participation rate.(教育成绩的成功反映在澳大利亚更广泛的经济中,因为它每年吸引着相当比例的高劳动市场参与率的技术移民。)可知,教育成功给澳大利亚带来的益处是吸引更多技术移民。故选A。