51. What do people believe chocolates can do?
- A. Cheer them up instantly.
- B. Create happy calories.
- C. Conceal emotional distress.
- D. Relieve them of heart trouble.
答案：A
答案句：We all have faith in chocolates to delight us in an instant!
参考译文：我们都相信巧克力能瞬间让我们开心起来！
定位线索：题干“What do people believe chocolates can do?”→答案句“We all have faith in chocolates to delight us in an instant!”；文中“delight us in an instant”对应选项A“Cheer them up instantly”（同义改写）。
解析：题干问人们相信巧克力能做什么，答案句直接说“We all have faith in chocolates to delight us in an instant”，即“瞬间让我们开心”，与选项A“Cheer them up instantly”完全对应。选项B“Create happy calories”偷换概念，原文说“channelling happy calories”而非创造；选项C“Conceal emotional distress”无中生有，原文说“comfort us”而非隐藏；选项D“Relieve them of heart trouble”曲解原文“calming down a racing heart”，这是比喻，并非治疗心脏病。
52. What was scientists' recent assertion about chocolates?
- A. They could become a rare treat in the near future.
- B. They could calm people down a bit in times of crisis.
- C. They could prevent people from getting heartbroken.
- D. They could become unavailable in less than 30 years.
答案：D
答案句：Recently, chocolate lovers were heartbroken as scientists claimed that they can become extinct by 2050!
参考译文：最近，巧克力爱好者们心碎了，因为科学家声称巧克力到2050年可能会灭绝！
定位线索：题干“scientists' recent assertion about chocolates”→答案句“scientists claimed that they can become extinct by 2050”；文中“by 2050”对应选项D“in less than 30 years”（从当前时间推算），“become extinct”对应“become unavailable”。
解析：题干问科学家最近的断言，答案句明确指出科学家声称巧克力“can become extinct by 2050”，即到2050年可能灭绝，选项D“become unavailable in less than 30 years”（在不到30年内变得不可获得）是对此的同义转述。选项A“become a rare treat”程度过轻，原文是“extinct”（灭绝）而非“rare”；选项B和C均与题干无关，答非所问。
54. What do we learn about the cacao farms in the crisis of global warming?
- A. They try to seek help from gene-editing scientists.
- B. They decide to move to cooler mountainous areas.
- C. They have suffered a lot due to a decrease in produce.
- D. They have benefited by raising prices of cocoa beans.
答案：C
答案句：Unfortunately, the crisis of global warming has already had a serious negative impact on cacao farms' yields, leading to the prices of chocolates skyrocketing.
参考译文：不幸的是，全球变暖的危机已经对可可农场的产量产生了严重的负面影响，导致巧克力价格飙升。
定位线索：题干“cacao farms in the crisis of global warming”→答案句“the crisis of global warming has already had a serious negative impact on cacao farms' yields”；文中“serious negative impact on yields”对应选项C“suffered a lot due to a decrease in produce”（产量下降）。
解析：题干问全球变暖危机中可可农场的情况，答案句明确指出全球变暖“has already had a serious negative impact on cacao farms' yields”，即产量受到严重影响，选项C“suffered a lot due to a decrease in produce”（因产量减少而遭受很大损失）正确。选项A“seek help from gene-editing scientists”是科学家主动尝试，而非农场求助；选项B“decide to move”是未来可能，而非已发生；选项D“benefited by raising prices”偷换概念，原文说价格飙升是负面影响的结果，并非农场受益。