51. What do some people think of aging adults?
- A. Their wisdom grows as time goes by.
- B. Their memory gradually deteriorates.
- C. They can benefit from late-in-life learning.
- D. They are likely to have mental health issues.
答案：B
答案句：Some people have said aging is more a slide into forgetfulness than a journey towards wisdom.
参考译文：一些人曾说，衰老更多是滑向健忘，而非走向智慧的旅程。
定位线索：题干“What do some people think of aging adults”→答案句首句“Some people have said aging is more a slide into forgetfulness”；文中“a slide into forgetfulness”对应选项B“Their memory gradually deteriorates”（记忆逐渐衰退）。
解析：题干问“some people”对老年人的看法，答案句直接引用其观点：衰老是“slide into forgetfulness”（滑向健忘），即记忆衰退，与B项“memory gradually deteriorates”同义。A项“wisdom grows”与原文“journey towards wisdom”相反，是作者反驳的观点；C项是作者观点，非“some people”；D项“mental health issues”原文未提及，无中生有。
52. What can we conclude from Geoffrey Raisman's finding?
- A. Brain damage seriously hinders one's learning.
- B. Brain power weakens slower than we imagine.
- C. Brains can refresh and improve with learning.
- D. Brains forge connections under new conditions.
答案：C
答案句：In the late 1960s, British brain scientist Geoffrey Raisman spied growth in damaged brain regions of rats through an electron microscope; their brains were forging new connections. This meant brains may change every time a person learns something new.
参考译文：20世纪60年代末，英国脑科学家杰弗里·雷斯曼通过电子显微镜观察到老鼠受损脑区的生长；它们的大脑正在建立新的连接。这意味着每当人学到新东西时，大脑都可能发生变化。
定位线索：题干“conclude from Geoffrey Raisman's finding”→答案句取自第2段“Geoffrey Raisman spied growth...”；文中“brains may change every time a person learns something new”对应选项C“Brains can refresh and improve with learning”（大脑能随学习而更新和改善）。
解析：题干要求从雷斯曼的发现中得出结论。答案句先描述发现：受损脑区生长、建立新连接，随后总结“brains may change every time a person learns something new”，即学习能改变大脑，对应C项“refresh and improve with learning”。A项“brain damage hinders learning”与原文相反；B项“brain power weakens slower”未提及；D项“forge connections under new conditions”是发现本身，但题干问“conclude”，需推出更概括的结论，C项更全面。
54. What does the author say can contribute to the improvement of brain function?
- A. Being curious and desiring knowledge.
- B. Being eager to pass brain tests at an old age.
- C. Rising to life's challenges and avoiding risks.
- D. Boosting immunity to serious mental diseases.
答案：A
答案句：Openness-a characteristic defined by curiosity and a desire for knowledge-may also help folks pass brain tests.
参考译文：开放性——一种由好奇心和求知欲定义的特征——也可能帮助人们通过大脑测试。
定位线索：题干“contribute to the improvement of brain function”→答案句取自第5段“Openness...may also help folks pass brain tests”；文中“curiosity and a desire for knowledge”对应选项A“Being curious and desiring knowledge”（好奇且渴望知识）。
解析：题干问什么有助于改善大脑功能。答案句明确说“Openness”（由好奇心和求知欲定义）能帮助通过大脑测试，即改善功能，对应A项。B项“eager to pass brain tests”是结果而非原因，偷换概念；C项“avoiding risks”原文未提及；D项“boosting immunity”原文说“reduced risk of mental disease”，但那是针对“new enterprises”，且“immunity”程度过重。