《2025年同步练习册山东人民出版社高中英语必修第二册外研版》

C
Plain water is the only thing visitors are allowed to have inside the huge cave at Carlsbad Caverns National Park in New Mexico. Puffed food（膨化食品）is a no - go, and the recent park visitor who dropped a bag full of it created a “huge influence” on the cave’s ecosystem, the park said in a website post.
“In people’s opinion, a dropped snack bag may not seem important, but to the life of the cave, it can be world changing,” the park said in its post about the rubbish found in the cave. “For example, the corn snacks, later softened by the watery air of the cave, formed the perfect environment for fungi and life unseen with human eyes. Spiders, flies and other cave life soon make up a temporary food web, spreading the nutrients（营养物）to the other areas of the cave. Then molds（霉菌）spread up the nearby surfaces and there are terrible smell in the whole cave. And the cycle continues.”
The park said the guards spent 20 minutes carefully removing molds and foreign rubbish from surfaces inside the cave, adding that while some members of the ecosystem that rose from the snacks were “cave - men”, “many of the molds and life unseen with human eyes are not.” The post considered such bad influence on the cave “completely avoidable”.
“Eating and drinking anything other than plain water attracts animals into the cave. No matter it is great or small, we all leave an influence wherever we go. Let us all leave the world a better place than we found it,” the post called on park goers.
After the post about the puffed food bag, the park put up this post about the “leave no trace” rule of dealing with rubbish properly. “The cave is NOT a big rubbish can,” the post said. “It can bear no more than plain water actually.” Visitors are asked to make sure they don’t leave rubbish in the cave.
28. What type of text is the passage?
A. A brochure.
B. A report.
C. An advertisement.
D. An encyclopedia.
29. What caused problem to the cave’s ecosystem?
A. The plain water.
B. The huge influence.
C. The great number of visitors.
D. The dropped bag of puffed food.
30. What did the park do with the problem?
A. Educate visitors through posts.
B. Continue the food web cycle.
C. Spend many 20 minutes cleaning.
D. Attract animals into the cave.
31. Which is the best slogan（标语）for the Carlsbad Caverns National Park?
A. All Food Out
B. No Drinks In
C. Plain Water Only
D. Healthy Snacks Only

答案： 【语篇解读】本文是一篇新闻报道。文章主要讲述了Carlsbad Caverns国家公园在网上发帖称，最近一名游客扔下一袋膨化食品，对洞穴的生态系统产生了“巨大影响”。
28. B 推理判断题。根据第一段中的“Puffed food（膨化食品）is a no-go，and the recent park visitor who dropped a bag full of it created a ‘huge influence’ on the cave's ecosystem，the park said in a website post.”可知，这是一份报道。故选B。
29. D 细节理解题。根据第二段中的“In people’s opinion，a dropped snack bag may not seem important，but to the life of the cave，it can be world changing...”可知，掉下来的一袋膨化食品给洞穴的生态系统带来了问题。故选D。
30. C 细节理解题。根据第三段中的“The park said the guards spent 20 minutes carefully removing molds and foreign rubbish from surfaces inside the cave...”可知，公园花了20多分钟清理这个问题。故选C。
31. C 推理判断题。根据最后一段中的“‘The cave is NOT a big rubbish can，’the post said.‘It can bear no more than plain water actually.’”可知，洞穴里面只能容纳清水，所以“只容纳清水”是Carlsbad Caverns国家公园的最佳口号。故选C。