28. What was a cause of the waterfowl population decline in North America?
- A. Loss of wetlands.
- B. Popularity of water sports.
- C. Pollution of rivers.
- D. Arrival of other wild animals.
答案：A
答案句：Millions of acres of wetlands were dried to feed and house the ever-increasing populations, greatly reducing waterfowl habitat.
参考译文：数百万英亩的湿地被排干，以供养和安置不断增长的人口，极大地减少了水禽的栖息地。
定位线索：题干“cause of the waterfowl population decline”→答案句“wetlands were dried...reducing waterfowl habitat”；文中“wetlands were dried”对应选项A“Loss of wetlands”。
解析：题干问水禽数量下降的原因，答案句明确指出湿地被排干导致栖息地减少，直接对应选项A“Loss of wetlands”。选项B“水上运动流行”、C“河流污染”、D“其他野生动物到来”在原文中均未提及，属于无中生有。
29. What does the underlined word “decimate” mean in the first paragraph?
- A. Acquire.
- B. Export.
- C. Destroy.
- D. Distribute.
答案：C
答案句：Unfortunately, it took the explorers and the settlers who followed only a few decades to decimate a large part of these resources. Millions of waterfowl ( 水 禽 ) were killed at the hands of market hunters and a handful of overly ambitious sportsmen.
参考译文：不幸的是，探险者和随后的定居者只用了短短几十年就大量毁灭了这些资源中的很大一部分。数百万只水禽死于市场猎人和少数野心过大的运动员之手。
定位线索：题干“decimate”→答案句“decimate a large part of these resources”；后句“Millions of waterfowl were killed”对应选项C“Destroy”。
解析：词义题需结合上下文。答案句后一句提到“数百万只水禽被杀死”，说明“decimate”意为“大量毁灭”，与选项C“Destroy”同义。选项A“Acquire”（获得）、B“Export”（出口）、D“Distribute”（分配）均与语境不符。
30. What is a direct result of the Act passed in 1934?
- A. The stamp price has gone down.
- B. The migratory birds have flown away.
- C. The hunters have stopped hunting.
- D. The government has collected money.
答案：D
答案句：About 98 cents of every duck stamp dollar goes directly into the Migratory Bird Conservation Fund to purchase wetlands and wildlife habitat for inclusion into the National Wildlife Refuge System — a fact that ensures this land will be protected and available for all generations to come. Since 1934, better than half a billion dollars has gone into that Fund to purchase more than 5 million acres of habitat.
参考译文：每张鸭票的每一美元中约有98美分直接进入候鸟保护基金，用于购买湿地和野生动物栖息地，纳入国家野生动物保护区系统——这一事实确保了这片土地将得到保护，并为子孙后代所用。自1934年以来，已有超过5亿美元进入该基金，购买了超过500万英亩的栖息地。
定位线索：题干“direct result of the Act passed in 1934”→答案句“About 98 cents of every duck stamp dollar goes directly into the Migratory Bird Conservation Fund”；文中“goes directly into the Fund”对应选项D“The government has collected money”。
解析：题干问1934年法案的直接结果，答案句明确指出每张鸭票的98美分直接进入基金，即政府通过销售鸭票筹集资金，对应选项D“The government has collected money”。选项A“邮票价格下降”、B“候鸟飞走”、C“猎人停止狩猎”在原文中均未提及，属于无中生有。
31. Which of the following is a suitable title for the text?
- A. The Federal Duck Stamp Story
- B. The National Wildlife Refuge System
- C. The Benefits of Saving Waterfowl
- D. The History of Migratory Bird Hunting
答案：A
答案句：When the explorers first set foot upon the continent of North America, the skies and lands were alive with an astonishing variety of wildlife. … In 1934, with the passage of the Migratory Bird Hunting Stamp Act (Act), an increasingly concerned nation took firm action to stop the destruction of migratory ( 迁徙) waterfowl and the wetlands so vital to their survival. … The very first Federal Duck Stamp was designed by J.N. “Ding” Darling, a political cartoonist from Des Moines, lowa, who at that time was appointed by President Franklin Roosevelt as Director of the Bureau of Biological Survey. … About 98 cents of every duck stamp dollar goes directly into the Migratory Bird Conservation Fund to purchase wetlands and wildlife habitat for inclusion into the National Wildlife Refuge System — a fact that ensures this land will be protected and available for all generations to come. … Since 1934, better than half a billion dollars has gone into that Fund to purchase more than 5 million acres of habitat. Little wonder the Federal Duck Stamp Program has been called one of the most successful conservation programs ever initiated.
参考译文：当探险家们第一次踏上北美大陆时，天空和陆地充满了令人惊叹的各种野生动物。美洲原住民一直明智地保护着这些宝贵的自然资源。不幸的是，探险家和随后的定居者只用了短短几十年就大量毁灭了这些资源中的很大一部分。数百万只水禽被市场猎人和少数过于雄心勃勃的运动员杀害。数百万英亩的湿地被排干，以供养和安置不断增长的人口，大大减少了水禽的栖息地。… 1934年，随着《候鸟狩猎印花税法》的通过，一个日益关注的国家采取了坚定行动，以阻止迁徙水禽及其生存至关重要的湿地的破坏。根据该法案，所有16岁及以上的水禽猎人必须每年购买并携带一张联邦鸭票。第一张联邦鸭票是由来自爱荷华州得梅因的政治漫画家J.N.“丁”达林设计的，他当时被富兰克林·罗斯福总统任命为生物调查局局长。… 每张鸭票美元的约98美分直接进入候鸟保护基金，用于购买湿地和野生动物栖息地，纳入国家野生动物保护区系统——这一事实确保了这片土地将得到保护，并为子孙后代所用。自1934年以来，超过5亿美元已进入该基金，购买了超过500万英亩的栖息地。难怪联邦鸭票计划被称为有史以来最成功的保护计划之一。
定位线索：题干“a suitable title”→全文围绕“Federal Duck Stamp”展开；首段背景引出问题，第二段“Federal Duck Stamp”出现并成为核心，末段“Federal Duck Stamp Program”总结；文中“Federal Duck Stamp”对应选项A“The Federal Duck Stamp Story”。
解析：本题为主旨题。全文从北美野生动物遭破坏引出1934年《候鸟狩猎印花税法》及联邦鸭票的设立，第二段详细介绍了鸭票的设计者，第三段说明鸭票资金用途及成效，末句总结“Federal Duck Stamp Program”是最成功的保护计划之一，因此标题应为“The Federal Duck Stamp Story”。选项B“国家野生动物保护区系统”只是鸭票资金用途的一部分，范围过窄；选项C“保护水禽的好处”文中未强调好处；选项D“候鸟狩猎历史”偏离主题，文中重点是保护而非狩猎。