重庆市2017高考英语阅读理解选编(19)(附解析)
阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。
(2017·西安市标准化考练,D)
Up to 45 rare species of Australian animals are in danger of becoming extinct within 20 years, scientists warned in a report. But hope is not lost! According to the report, the species can be saved if immediate action is taken to control their natural predators (天敌) and other threats.
The threatened animals can be found in the faraway Kimberley region of northwestern Australia. The region is similar in square miles to California. Thirty percent of the endangered species are unique to the region, while others have already disappeared in other parts of Australia.
Dr. Tara Martin, a research scientist said in the report, ?A large extinction event is happening in Australia. The north has really been the last stronghold (主要栖息地) for many species of birds and mammals and reptiles. The Kimberley is really their last chance on earth.”
Many of the species are under threat because they are hunted by wild cats. These cats kill around 500 000 native animals in the Kimberley region every day.
The species face another threat, too. Their native habitat is also being destroyed by wildfires and by wild donkeys and goats that compete for food and water. Humans introduced cats, donkeys and goats to Australia to be farm animals or pets. However, their populations have exploded in the region because they have few natural predators.
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