1.The underlined sentence in Para. 1 implies that _.
A.the Midwest is the most prosperous in the US
B.the Midwest is the most fertile in the world
C.the Midwest is expecting a good harvest
D.the Midwest is within reach of prosperity
正确答案：C
解析：划线句为 ‘Everything as far as the eye can see radiates a sense of prosperity.’，结合前文描述农作物长势旺盛（soybeans and wheat flourishing, corn over six feet tall）、牲畜安详放牧等景象，表明当前正值丰收在望的季节，’prosperity’在此语境中指农业丰产带来的繁荣表象，而非绝对经济地位（排除A、B）或抽象可达性（D）。C项最贴合语境。
2.What does the author say about the farmers in Para. 2?
A.They live a tranquil but industrious life.
B.They work very hard and learn new skills.
C.They work longer hours during weekdays.
D.They have to compete with farmers in other countries.
正确答案：B
解析：第二段明确指出：’Farmers in the Midwest put in some of the longest workdays… In addition to caring for their crops and livestock, they have to keep up with new farming techniques…’，即农民工作时间长且需持续学习新技术（如防治水土流失、提高畜牧产量等），B项准确概括；A项’industrious’虽合理，但’tranquil’与原文’The tranquility… is misleading’矛盾；C、D文中未提及。
A.American farmers feed almost three quarters of the world population
B.75 percent of corn and soybeans in the world market come from the US
C.American agricultural exports have a share of 75% in the global market
D.corn and soybeans take up about three quarters of American agricultural exports
正确答案：B
解析：第三段末句：’Corn and soybean exports alone account for approximately 75 percent of the amount sold in world markets.’ 即美国玉米和大豆出口量占世界市场同类产品销售总量的约75%，B项精准转述；A夸大事实（原文说’feed… millions of other people’，非’almost three quarters’）；C混淆主体（是两类作物占世界市场75%，非美国全部农产出口占全球75%）；D无依据。
A.soil deterioration is becoming a serious problem
B.climate change reduces the area of the croplands
C.customers have to pay more for agricultural products
D.high productivity comes along with damaging forces of nature
正确答案：D
解析：第四段首句：’This productivity, however, has its price. Intensive cultivation exposes the earth to the damaging forces of nature.’ 直接点明高产伴随自然破坏力，D项为原文同义转述；A虽属实（后文称’soil erosion has become a national problem’），但非本段核心论点，而是’price’的具体表现；B、C文中未提。
解析：第二段首句：’…my oldest brother was a bit of a car guy and subscribed to cool magazines like Car and Driver and Motor Trend.’ 后文’Every so often, one of those magazines would run an article…’进一步佐证兴趣源于杂志，B项正确；A、C、D均无原文支持。
A.the author’s car is as expensive as his brother’s
B.the author’s car fulfills more functions than his brother’s
C.not much has changed in the way people drive cars
D.improved performance of cars helps to reduce traffic accidents
正确答案：C
解析：第一段对比’Car of the Future’设想（核能、新造型）与现实：’my car doesn’t do anything that my brother’s Studebaker didn’t do. It goes, it stops, it burns gasoline, and it plays music. I still have to steer it…’，说明基础驾驶功能百年未变，C项为合理推断；A、B、D均属无中生有。
C.kill rather than protect people in low-speed collisions
D.have been standard equipment of all European cars for years
正确答案：B
解析：第二段：’Airbags aren’t the be-all and end-all in safety… considering the recent news about people occasionally being killed by their airbags in low-speed collisions, they obviously still need some development.’ 明确指出需改进，B项正确；A与’won’t be going away’矛盾；C以偏概全（’occasionally killed’不等于’kill rather than protect’）；D无依据（仅提’European manufacturers already offer side-impact airbags’，非所有车标配）。
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