51. What do we learn from the passage about the Coral Sea?
- A. It is exceptionally rich in marine life.
- B. It is the biggest marine protected area.
- C. It remains largely undisturbed by humans.
- D. It is a unique haven of endangered species.
答案：A
答案句：Home to virgin reefs, rare sharks and vast numbers of exotic fish, the Coral Sea is a unique haven of biodiversity off the northeastern coast of Australia.
参考译文：珊瑚海拥有原始礁石、珍稀鲨鱼和大量奇异鱼类，是澳大利亚东北海岸外一个独特的生物多样性天堂。
定位线索：题干“Coral Sea”→答案句首句“Home to virgin reefs, rare sharks and vast numbers of exotic fish”；文中“unique haven of biodiversity”对应选项A“exceptionally rich in marine life”。
解析：题干问关于珊瑚海我们了解到什么，答案句直接描述其拥有原始礁石、珍稀鲨鱼和大量奇异鱼类，是生物多样性天堂，与选项A“海洋生物极其丰富”同义。选项B“最大的海洋保护区”是提议而非现状，偷换概念；选项C“未受人类干扰”无中生有；选项D“濒危物种”文中只提“rare sharks”，范围扩大。
52. What does the Australian government plan to do according to Tony Burke?
- A. Make a new proposal to protect the Coral Sea.
- B. Revise its conservation plan owing to criticisms.
- C. Upgrade the established reserves to protect marine life.
- D. Complete the series of marine reserves around its coast.
答案：D
答案句：Unveiled recently by environment minister Tony Burke, the proposal would be the last in a series of proposed marine reserves around Australia's coast.
参考译文：该提议由环境部长托尼·伯克最近公布，将是澳大利亚海岸一系列拟议海洋保护区中的最后一个。
定位线索：题干“Tony Burke”→答案句“Unveiled recently by environment minister Tony Burke”；文中“the last in a series of proposed marine reserves”对应选项D“Complete the series of marine reserves”。
解析：题干问根据托尼·伯克，澳大利亚政府计划做什么。答案句明确指出该提议是海岸一系列保护区中的最后一个，即完成系列，对应选项D。选项A“提出新提议”是已发生而非计划；选项B“修改计划”无中生有；选项C“升级现有保护区”偷换概念。
53. What is scientists' argument about the Coral Sea proposal?
- A. The government has not done enough for marine protection.
- B. It will not improve the marine reserves along Australia's coast.
- C. The government has not consulted them in drawing up the proposal.
- D. It is not based on sufficient investigations into the ecological system.
答案：A
答案句：But the scheme is attracting criticism from scientists and conservation groups, who argue that the government hasn't gone far enough in protecting the Coral Sea, or in other marine reserves in the coastal network.
参考译文：但该计划正受到科学家和保护组织的批评，他们认为政府在保护珊瑚海或沿海网络中的其他海洋保护区方面做得还不够。
定位线索：题干“scientists' argument”→答案句“scientists and conservation groups, who argue”；文中“hasn't gone far enough”对应选项A“has not done enough”。
解析：题干问科学家关于珊瑚海提议的论点。答案句直接说明科学家批评政府“做得不够”，与选项A“政府未做足够海洋保护”同义。选项B“不会改善保护区”无中生有；选项C“未咨询科学家”无中生有；选项D“未基于充分调查”是后文对西南部保护区的批评，答非所问。