B．One third of people living in Australia come from Europe.

　　C．The Australian economy is dependent on sheep exports.

　　D．Most Australians have ancestors who were prisoners.

　　答案：A　推理判断题。根据文章倒数第二段的Originally coming almost entirely from the British Isles, today one in three Australians comes from elsewhere排除B；根据文章第二段的However, it is no longer dominant (主宰的). Much of Australia's relatively sound economy is now achieved from natural coal and wheat, and by being the largest diamond producer in the world排除C；根据文章第三段的Yet, contrary to widespread belief, very few Australians have true prisoner origin排除D；根据文中第二段的第二句话Almost 90 percent of the population lives in the fast­paced cities和该段第四句话In contrast, the rural communities tend to be slow­moving and conservative.可知城市生活和乡村生活是不一样的。故选A。

　　3．What used to be Australia's main money earner?

　　A．Wheat.

　　B．Wool.

　　C．Tourism.

　　D．Diamond.

　　答案：B　细节理解题。Wheat小麦；Wool羊毛；Tourism旅游业；Diamond钻石。根据题干关键词 used to be Australia's main money earner找到文中对应句子是文中第二段的句子For many years, Australia was said to have “ridden on the sheep's back”， a reference to wool being the country's main money earner可知羊毛是过去澳大利亚人主要的经济来源。故选B。

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