In line with longstanding（由来已久的） initiatives（举措） to expand its green spaces, New York City is planting tens of thousands of trees each year. They provide shade, lower surface temperatures, absorb a surprising amount of airborne carbon（空气中的碳）, remove tiny pollutants, and provide wildlife habitat along with just plain beauty. （现象）
Something could go wrong, though, according to a new study. Oaks and sweetgums, which currently account for a majority of the city's trees, produce huge amounts of a chemical substance （化学物质）called isoprene（异戊二烯）. Harmless by itself, isoprene interacts（与...产生化学反应） rapidly with polluting nitrogen oxides（氮氧化物） released by vehicles, buildings and industry to form ground-level ozone （臭氧）一-a major factor in many breathing problems. （问题）
The research, carried out by scientists at the Columbia Climate School and other institutions, found that if the city maintains past species patterns in new plantings, isoprene production in Manhattan in coming decades will go up by about 140%, and resulting summer ozone levels as much as 30%. （研究结论）
“We're all for planting more trees. They bring so many good things,” said study coauthor Roisin Commane. “But if we’re not careful, we could make air quality worse.” （多方观点1）
The Parks Department is not oblivious to the issue. A study carried out by some of its researchers several years ago concluded that city trees did release isoprene. “We didn't make a big deal of that,” said Novem Auyeung, a Parks Department senior scientist. She said trees should not be viewed as the enemy. “We could plant any trees we want to, if we just rethink our car-centric lifestyle,” she said. （多方观点2＋解决方案）
“We're not going to go cutting down any big old oaks, and neither will the department completely stop planting new ones,” said Auyeung. “You have to think about what you would lose if you do that.” Oaks are keystone species, she pointed out, providing food and habitat for native insects, birds and other animals.（多方观点2＋解决方案）
本文属于人与自然的范畴，是一篇科普说明文，文本以“现象-问题-研究结论-多方观点-解决方案”这一逻辑链，文章解释说明了“种橡树和糖枫树带来臭氧污染”这一科学事理，从科学角度引导学生辩证认识种树的利弊，同时也提出了人类需重新审视以汽车为中心的生活方式这一核心解决方案。
28题（细节理解-了解现象和问题根源）：Harmless by itself, isoprene interacts（与...产生化学反应） rapidly with polluting nitrogen oxides（氮氧化物） released by vehicles, buildings and industry to form ground-level ozone （臭氧）一-a major factor in many breathing problems. 本题的设置是帮助学生辩证认识种树的利弊，并抓住造成呼吸道健康问题的根源。
29题（推理判断-了解研究结论和观点1）：此题的设置是让学生推理文章中人物的观点。从“We're all for planting more trees. They bring so many good things”这句可以得知Commane支持种树，但如何种，如何careful，从上文 “if the city maintains past species patterns in new plantings, isoprene production in Manhattan in coming decades will go up by about 140%, and resulting summer ozone levels as much as 30%.”则可以反向推断出需要合理的树种搭配模式来改善异戊二烯的产生。
30题（词义猜测-了解观点2和解决方案）：此题的设置目的也是让学生通过对阅读和理解Novem Auyeung的观点来判断oblivious的含义。
31题（态度判断-了解观点2和解决方案）：此题的设置目的同样也是让学生通过阅读和理解Auyeung的观点来判断其态度和主张。
