26. What problem are U.S. national parks faced with?
- A. Decline of business profits.
- B. Inadequate commercialization.
- C. Lack of transportation services.
- D. Poorly maintained infrastructure.
答案：D
答案句：But the government is right about one thing: U.S. national parks are in crisis. Collectively, they have a maintenance backlog of more than $ 12 billion. Roads, trails, restrooms, visitor centers and other infrastructure are crumbling.
参考译文：但政府有一点是对的：美国国家公园正处于危机之中。总的来说，它们有超过120亿美元的维护积压。道路、小径、洗手间、游客中心和其他基础设施正在破败。
定位线索：题干“What problem are U.S. national parks faced with”→答案句取自第2段“U.S. national parks are in crisis”；文中“maintenance backlog”“crumbling”对应选项D“Poorly maintained infrastructure”。
解析：题干问国家公园面临的问题，答案句明确指出公园处于危机，有120亿美元维护积压，基础设施 crumbling，直接对应D选项“维护不善的基础设施”。A“商业利润下降”、B“商业化不足”、C“交通服务缺乏”均未在答案句中提及，属于无中生有。
27. Increased privatization of the campgrounds may.
- A. spoil visitor experience
- B. help preserve nature
- C. bring operational pressure
- D. boost visits to parks
答案：A
答案句：Moreover, increased privatization would certainly undercut one of the major reasons why 300 million visitors come to the parks each year: to enjoy nature and get a break from the commercial drumbeat that overwhelms daily life.
参考译文：此外，增加私有化肯定会削弱每年3亿游客来公园的主要原因之一：享受大自然，摆脱淹没日常生活的商业喧嚣。
定位线索：题干“Increased privatization of the campgrounds may”→答案句取自第4段“increased privatization would certainly undercut...”；文中“undercut...to enjoy nature and get a break from the commercial drumbeat”对应选项A“spoil visitor experience”。
解析：题干问增加私有化可能带来的影响，答案句指出这会削弱游客享受自然、摆脱商业喧嚣的体验，即破坏游客体验，对应A。B“帮助保护自然”与原文相反，C“带来运营压力”、D“增加公园访问量”在答案句中无依据，属于无中生有。
28. According to Paragraph 5, most respondents in the survey would.
- A. go to the national parks on a regular basis
- B. advocate a bigger budget for the national parks
- C. agree to pay extra for the national parks
- D. support the national parks’ recent reforms
答案：C
答案句：An economic survey of 700 U.S. taxpayers found that people would be willing to pay a significant amount of money to make sure the parks and their programs are kept intact. Some 81% of respondents said they would be willing to pay additional taxes for the next 10 years to avoid any cuts to the national parks.
参考译文：一项对700名美国纳税人的经济调查发现，人们愿意支付大量资金以确保公园及其项目保持完整。约81%的受访者表示，他们愿意在未来10年缴纳额外税款，以避免国家公园被削减。
定位线索：题干“According to Paragraph 5, most respondents in the survey would”→答案句取自第5段“Some 81% of respondents said they would be willing to pay additional taxes”；文中“pay additional taxes”对应选项C“agree to pay extra for the national parks”。
解析：题干定位到第5段，答案句明确81%受访者愿意支付额外税款，对应C“同意为国家公园额外付费”。A“定期去国家公园”、B“主张更大预算”、D“支持近期改革”均未在答案句中提及，属于无中生有。
29. The national parks are valuable in that they.
- A. lead the way in tourism
- B. have historical significance
- C. sponsor research on climate
- D. provide an income for the locals
答案：B
答案句：The parks also help keep America’s past alive, working with thousands of local jurisdictions around the country to protect historical sites and to bring the stories of these places to life.
参考译文：公园还帮助保持美国历史的活力，与全国数千个地方管辖区合作，保护历史遗址，并将这些地方的故事生动呈现。
定位线索：题干“The national parks are valuable in that they”→答案句取自第6段“The parks also help keep America’s past alive...protect historical sites”；文中“keep America’s past alive”“protect historical sites”对应选项B“have historical significance”。
解析：题干问公园的价值所在，答案句指出公园帮助保持历史活力、保护历史遗址，对应B“具有历史意义”。A“引领旅游业”、C“赞助气候研究”、D“为当地人提供收入”虽在原文其他部分提及，但并非答案句直接支持的内容，且与题干问的“valuable”对应不直接，属于答非所问。
30. It can be concluded from the text that the national park system.
- A. is able to cope with staff shortages
- B. is able to meet visitors’ demands
- C. is in need of a new pricing policy
- D. is in need of a funding increase
答案：D
答案句：The real problem is that the parks have been chronically starved of funding. An economic survey of 700 U.S. taxpayers found that people would be willing to pay a significant amount of money to make sure the parks and their programs are kept intact. Some 81% of respondents said they would be willing to pay additional taxes for the next 10 years to avoid any cuts to the national parks. … The parks do all this on a shoestring. Congress allocates only $ 3 billion a year to the national park system—an amount that has been flat since 2001 (in inflation-adjusted dollars) with the exception of a onetime boost in 2009. Meanwhile, the number of annual visitors has increased by more than 50% since 1980, and now stands at 330 million visitors per year.
参考译文：真正的问题在于，公园长期以来一直资金匮乏。一项针对700名美国纳税人的经济调查发现，人们愿意支付大量资金以确保公园及其项目保持完好。约81%的受访者表示，他们愿意在未来10年内缴纳额外税款，以避免对国家公园进行任何削减。 … 公园在极其有限的资金下完成这一切。国会每年仅拨款30亿美元给国家公园系统——自2001年以来（按通胀调整后的美元计算）这一数额一直持平，除了2009年的一次性增加。与此同时，自1980年以来，年游客数量增加了50%以上，目前每年达到3.3亿人次。
定位线索：题干“It can be concluded from the text that the national park system”→答案句取自第5段“The real problem is that the parks have been chronically starved of funding”和第7段“Congress allocates only $ 3 billion a year”；文中“chronically starved of funding”、“on a shoestring”、“only $ 3 billion”对应选项D“is in need of a funding increase”（需要增加资金）。
解析：题干要求从全文得出结论，答案句明确指出“真正的问题在于公园长期资金匮乏”，并列举国会拨款仅30亿美元且多年持平、游客量却增长50%以上，这些事实共同推出公园系统需要增加资金，对应D选项。A、B选项无中生有，文中未提及人员短缺或满足游客需求；C选项偷换概念，文中讨论的是资金问题而非定价政策。