21. The climate-friendly eggs are produced.
- A. at a considerably low cost
- B. at the demand of regular shoppers
- C. as a replacement for organic eggs
- D. on specially designed farms
答案：D
答案句：These eggs, which are making their debut now on shelves for as much as $ 8 a dozen, are still labeled organic and animal-friendly, but they're also from birds that live on farms using regenerative agriculture——special techniques to cultivate rich soils that can trap greenhouse gases.
参考译文：这些鸡蛋现在首次上架，售价高达每打8美元，仍被标注为有机和动物友好型，但它们也来自使用再生农业的农场饲养的鸟类——这是一种培育能够捕获温室气体的肥沃土壤的特殊技术。
定位线索：题干“climate-friendly eggs”→答案句“These eggs”（指代气候友好蛋）；文中“farms using regenerative agriculture”对应选项D“specially designed farms”（专门设计的农场）。
解析：题干问气候友好蛋是如何生产的。答案句明确指出这些蛋来自使用再生农业的农场，即专门设计用于培育土壤和捕获温室气体的农场，与选项D“specially designed farms”直接对应。选项A“低成本”与文中“as much as $8 a dozen”矛盾；选项B“普通购物者需求”无中生有；选项C“替代有机蛋”偷换概念，文中说仍标注为有机。
22. Larry Brown is excited about his progress in.
- A. reducing the damage of worms
- B. accelerating the disposal of waste
- C. creating a sustainable system
- D. attracting customers to his products
答案：C
答案句：”I'm excited about our progress” says Brown, who harvests eggs for Denver based Nest Fresh Eggs and is adding more cover crops that draw worms and crickets for the chickens to eat. The birds' waste then fertilizes fields. Such improvements “allow our hens to forage for higher-quality natural feed that will be good for the land, the hens, and the eggs that we supply to our customers.”
参考译文：“我对我们的进展感到兴奋，”布朗说，他为丹佛的Nest Fresh Eggs公司收获鸡蛋，并正在增加更多覆盖作物，吸引蠕虫和蟋蟀供鸡食用。鸟类的粪便随后肥沃了田地。这样的改进“让我们的母鸡能觅食更高质量的天然饲料，这对土地、母鸡以及我们供应给客户的鸡蛋都有好处。”
定位线索：题干“Larry Brown is excited about his progress”→答案句“I'm excited about our progress”；文中“adding more cover crops”“birds' waste fertilizes fields”“good for the land, the hens, and the eggs”对应选项C“creating a sustainable system”（创造可持续系统）。
解析：题干问布朗对哪方面进展感到兴奋。答案句描述他增加覆盖作物、鸡粪肥田、母鸡觅食高质量饲料，形成一个良性循环，即可持续系统，对应选项C。选项A“减少蠕虫损害”曲解原文（吸引蠕虫供鸡吃）；选项B“加速废物处理”偷换概念（文中是施肥）；选项D“吸引顾客”无中生有。
23. The example of organic eggs is used in Paragraph 4 to suggest.
- A. the doubts over natural feeds
- B. the setbacks in the egg industry
- C. the potential of regenerative products
- D. the promotional success of supermarkets
答案：C
答案句：The egg industry's push is the first major test of whether animal products from regenerative farms can become the next premium offering. In barely more than a decade, organic eggs went from being dismissed as a niche product in natural foods stores to being sold at Walmart. More recently there were similar doubts about probiotics and plant-based meats, but both have exploded into major supermarket categories. If the sustainable-egg rollout is successful, it could open the floodgates for regenerative beef, broccoli, and beyond.
参考译文：蛋品行业的推动是对再生农场动物产品能否成为下一个高端产品的首次重大考验。在短短十多年里，有机鸡蛋从被斥为天然食品店的小众产品发展到在沃尔玛销售。最近，益生菌和植物基肉类也曾有类似质疑，但两者都已爆发成为主要超市品类。如果可持续鸡蛋的推出成功，它可能为再生牛肉、西兰花等打开闸门。
定位线索：题干“example of organic eggs in Paragraph 4”→答案句“organic eggs went from being dismissed...to being sold at Walmart”；文中“If the sustainable-egg rollout is successful, it could open the floodgates”对应选项C“the potential of regenerative products”（再生产品的潜力）。
解析：例证题中，有机鸡蛋的例子本身不是答案依据，例子前面的观点句“The egg industry's push is the first major test of whether animal products from regenerative farms can become the next premium offering”和后面的总结句“If the sustainable-egg rollout is successful, it could open the floodgates”才是关键，说明例子旨在表明再生产品有潜力成为下一个高端品类，对应选项C。选项A“对天然饲料的质疑”答非所问；选项B“蛋品行业挫折”与例子成功相反；选项D“超市促销成功”范围扩大。
24. It can be learned from the last paragraph that young people.
- A. are reluctant to change their diet
- B. are likely to buy climate-friendly eggs
- C. are curious about new food
- D. are amazed at agriculture advances
答案：B
答案句：Surveys show that younger generations are more concerned about climate change, and some of the success of plant-based meat can be chalked up to shoppers wanting to signal their desire to protect the environment. Young adults “really care about the planet/9 says John Brunnquell, president of Egg Innovations. ”They are absolutely altering the food chain beyond what I think even they understand what they're doing.”
参考译文：调查显示，年轻一代更关心气候变化，植物基肉类的部分成功可归因于购物者希望表明他们保护环境的愿望。Egg Innovations总裁John Brunnquell说，年轻人“真的很关心地球”。“他们绝对在改变食物链，我认为甚至他们自己都不完全理解自己在做什么。”
定位线索：题干“last paragraph that young people”→答案句“younger generations are more concerned about climate change”“Young adults really care about the planet”；文中“altering the food chain”对应选项B“are likely to buy climate-friendly eggs”（可能购买气候友好蛋）。
解析：题干问从最后一段能推断年轻人如何。答案句表明年轻人关心气候变化、愿意为环保买单，且正在改变食物链，由此可推断他们可能购买气候友好蛋，对应选项B。选项A“不愿改变饮食”与“altering the food chain”相反；选项C“对新食物好奇”无中生有；选项D“对农业进步惊讶”偷换概念（文中是改变而非惊讶）。
25. John Brunnquell would disagree with Julie Stanton over regenerative
- A. market prospects
- B. standard definition
- C. nutritional value
- D. moral implication
答案：A
答案句：Regenerative products could be a hard sell, because the concept is tough to define quickly, says Julie Stanton, associate professor of agricultural economics at Pennsylvania State University Brandywine. Such farming also brings minimal, if any, improvement to the food products (though some producers say their eggs have more protein). The industry is betting that the same consumers paying more for premium attributes such as free-range, non-GMO, and pasture-raised eggs will embrace sustainability. Surveys show that younger generations are more concerned about climate change, and some of the success of plant-based meat can be chalked up to shoppers wanting to signal their desire to protect the environment. Young adults “really care about the planet/9 says John Brunnquell, president of Egg Innovations. ”They are absolutely altering the food chain beyond what I think even they understand what they're doing.”
参考译文：宾夕法尼亚州立大学布兰迪万分校农业经济学副教授Julie Stanton说，再生产品可能很难卖，因为这个概念很难快速定义。这种农业对食品的改善即使有也微乎其微（尽管一些生产者说他们的鸡蛋蛋白质更多）。行业押注，那些为散养、非转基因和牧场饲养鸡蛋等高端属性支付更多费用的消费者将接受可持续性。调查显示，年轻一代更关心气候变化，植物基肉类的部分成功可归因于购物者希望表明他们保护环境的愿望。Egg Innovations总裁John Brunnquell说，年轻人“真的很关心地球”。“他们绝对在改变食物链，我认为甚至他们自己都不完全理解自己在做什么。”
定位线索：题干“John Brunnquell would disagree with Julie Stanton”→答案句Stanton观点“Regenerative products could be a hard sell”（难卖）与Brunnquell观点“They are absolutely altering the food chain”（正在改变）；文中“hard sell”对应选项A“market prospects”（市场前景）。
解析：题干问Brunnquell与Stanton在再生产品的哪方面意见不一。Stanton认为再生产品“could be a hard sell”（难卖），即市场前景不乐观；Brunnquell则认为年轻人正在改变食物链，暗示市场前景好，两人分歧在于市场前景，对应选项A。选项B“标准定义”是Stanton提到的但Brunnquell未涉及；选项C“营养价值”文中提到“some producers say their eggs have more protein”但非两人分歧点；选项D“道德含义”无中生有。