52. What did the FBI do after the recovery of the letter?
- A. They proved its authenticity.
- B. They kept it in a special safe.
- C. They arrested the suspect immediately.
- D. They pressed criminal charges in vain.
答案：A
答案句：Their art crime team recovered the letter but were unable to press charges because the time of limitations had ended. The FBI worked closely with the Archives to determine that the letter was both authentic and definitely Smithsonian's property.
参考译文：他们的艺术犯罪小组找回了这封信，但由于诉讼时效已过，无法提起诉讼。联邦调查局与档案馆密切合作，确定这封信既真实可靠，又绝对是史密森学会的财产。
定位线索：题干“after the recovery”→答案句取自第3段“recovered the letter”、“determine that the letter was both authentic”；文中“determine that the letter was both authentic”对应选项A“proved its authenticity”。
解析：题干问FBI找回信后做了什么。答案句说FBI与档案馆合作“determine that the letter was both authentic”，即证明其真实性，对应A项。B项是档案馆的做法，非FBI；C项无中生有，文中未提逮捕；D项与原文矛盾，原文说“unable to press charges”，而非“pressed charges in vain”。
53. What is Darwin's letter about?
- A. The evolution of Yellowstone National Park.
- B. His cooperation with an American geologist.
- C. Some geological evidence supporting his theory.
- D. His acknowledgement of help from a professional.
答案：D
答案句：The letter was written by Darwin to thank an American geologist, Dr. Ferdinand Vandeveer Hayden, for sending him copies of his research into the geology of the region that would become Yellowstone National Park.
参考译文：这封信是达尔文写给一位美国地质学家费迪南德·范德维尔·海登博士的，感谢他寄来自己关于后来成为黄石国家公园地区的地质研究副本。
定位线索：题干“What is Darwin's letter about”→答案句取自第4段“to thank an American geologist”；文中“to thank”对应选项D“acknowledgement of help”，“an American geologist”对应“a professional”。
解析：题干问信的内容。答案句说信是达尔文“to thank”海登博士，即表达感谢，对应D项“acknowledgement of help”。A项偷换概念，信是关于地质研究而非黄石公园的演化；B项“cooperation”无中生有，文中只提感谢；C项“supporting his theory”无中生有，文中未提进化论。
54. What will the Smithsonian Institution Archives do with the letter according to Kapsalis?
- A. Reserve it for research purposes only.
- B. Turn it into an object of high interest.
- C. Keep it a permanent secret.
- D. Make it available online.
答案：D
答案句：. After it is repaired, we will take digital photos of it and that will be available online. One of our goals is to get items of high research value or interest to the public online.”
It would
参考译文：“修复后，我们将为它拍摄数码照片，并将在网上提供。我们的目标之一是将具有高研究价值或公众兴趣的物品放到网上。”
定位线索：题干“according to Kapsalis”→答案句取自第5段Kapsalis的引语“will be available online”；文中“available online”对应选项D“Make it available online”。
解析：题干问档案馆将如何处理这封信。答案句中Kapsalis明确说“will be available online”，且目标是“get items...to the public online”，对应D项。A项“only”程度过重，文中未说仅用于研究；B项偷换概念，文中说“high research value or interest”是物品本身属性，非将其变成；C项与原文矛盾，文中说要公开。