单选题 Beginning in October, more than 13,000 McDonald's restaurants in America will use a new kind of cooking oil. McDonald's aims to make its French fries and other fried foods healthier.
The change will not affect the taste or the number of calories in the food. But by changing the cooking oil, McDonald's says, it hopes to cut by nearly half the amount of trans-fatty acids(转换脂肪酸) in French fries and reduce the amount of saturated fats(饱和脂肪) by 16 percent. Scientists believe that trans-fatty acids and saturated fats raise cholesterol(胆固醇) levels and increase the risk of heart disease.
McDonald's new step is important because McDonald's is an industry leader and other fast-food chains and food processors may follow the lead.
For McDonald's, the action comes at a time when Americans are becoming more and more concerned about; obesity(肥胖) is an increasing pressure on food companies to offer healthy food to consumers.
After three years of study, McDonald's officials say they are switching oil that is lower in saturated fats and trans-fatty acids. McDonald's says the change will not cause higher coats for consumers.
Though there is some change, scientists say that the amount of trans-fat in foods at McDonald's and at other fast-food companies is still important.

单选题 The main idea of the text is ______.
A. McDonald's is a pioneer in food products
B. McDonald's is enlarging its restaurants in the world
C. fried foods can't keep up with the development of moden society
D. McDonald's is to use new cooking oil
【正确答案】 D
【答案解析】全文都是围绕着McDonald's将使用一种新的有益于消费者健康的食用油而展开的,因此选[D]。
单选题 More than 13,000 McDonald's restaurants in America will use a new kind of cooking oil to ______.
A. lower the costs of the products
B. make its food taste better than ever before
C. cure the heart disease
D. do good to the health of consumers
【正确答案】 D
【答案解析】由第一段末句“McDonald's aims to make its French fries(油炸食品)and other fried foods healthier.”即可得出答案为[D]。
单选题 When a new kind of cooking oil is used in McDonald's, ______.
A. the prices of McDonald's foods will be much higher
B. consumers will find the taste of McDonald's foods different
C. many other food companies will do what McDonald's does
D. fatness will disappear in American society sooner or later
【正确答案】 C
【答案解析】文章第三段指出,由于McDonald's在快餐业的领导地位,它对食用油的改变必将使“other fast-food chains and food processors may follow the lead.”,所以[C]正确。文章第五段指出,McDonald's官方宣称此次食用油的变更不会使其食品价格上升,故排除[A];文章没有说明此次食用油的变更是否影响到了食物的味道,故排除[B];[D]也未在文章中体现。
单选题 The underlined word" switching" in Paragraph 5 probably means ______.
A. losing B. spending C. changing D. studying
【正确答案】 C
【答案解析】联系switching所在的句子,McDonald's官员说这种油含有更低的转换脂肪酸和饱和脂肪,所以应该是改变了的食用油,故选[C]。
单选题 Which of the following is true according to the passage?
A. If a person's cholesterol is high, it won't affect his health.
B. Heart disease is connected with the contents of cholesterol.
C. The Americans pay no attention to the action of McDonald's.
D. Most of American foods are lower in trans-fatty acids.
【正确答案】 B
【答案解析】文章第二段最后指出,转基因脂肪酸和饱和脂肪酸提高了人体胆固醇的含量,增加患心脏病的危险。所以[D]正确,同时[A]错误。文章第四段第一句就说明了美国社会对McDonald's的行为给予了很大的关注,因此排除[C];由原文知,McDonald's和许多其他家的快餐油炸食品在转基因脂肪酸的含量上都是很高的,不然:McDonald's不会要对其食用油进行更换,并且能够降低近一半的转基因脂肪酸的含量,故排除[D]。