单选题 Beginning in October, more than 13000 McDonald's restaurants in America will use a new variety 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, which is also 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 fatty acids in foods at McDonald's and at other fast-food companies is still important.

单选题 The main idea of the text is______.

【正确答案】 D

【答案解析】[解析] 主旨大意题。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，所以D)为正确答案。
[避错] A)“麦当劳是食品生产的先驱者”，文中第三段只是说麦当劳是行业领导者，并未说是先驱者；B)“麦当劳正在世界上扩大餐馆”，文中并未提及；而C)从文章中不能看出油炸食品是否跟上时代的要求，这也不是文章的主要思想。

单选题 More than 13 000 McDonald's restaurants in America will use a new kind of cooking oil to______.

【正确答案】 D

【答案解析】[解析] 细节推断题。由线索词13000，new和cooking oil定位到文中第一段最后一句： McDonald's aims to make its French fries and other fried foods healtlaier．得出答案为D)。
[避错] A)“降低产品成本”文中并未提及产品成本高低问题；B)“让食物尝起来比以前更好吃”，这与文章第二段第一句“这种油并不影响食物的味道和热量”相矛盾，故排除；C) “治疗心脏病”，新使用的油没有这种功能，只是以前的油有提高心脏病的风险，新使用的油会降低这种风险而已。

单选题 When a new kind of cooking oil is used in McDonald's,_______.

【正确答案】 C

【答案解析】[解析] 事实细节题。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，故选C)。
[避错] 文章第五段指出，McDc3nald's说此次食用油的变更不会使其食品价格上升，故A) 错；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B)错误；D)也未在文章中体现。

单选题 The word "switching" (Line 1, Para. 5) has the same meaning as"______".

【正确答案】 C

【答案解析】[解析] 语义理解题。由线索词switching定位到文中第五段第一句话。McDonald's官员说这种油含有更低的转换脂肪酸和饱和脂肪，因此应该是改变了的食用油，故选C)。
[避错] A)“丢失”；B)“消费”和D)“研究”均与文意不符，故排除。

单选题 Which of the following is TRUE according to the passage?

【正确答案】 B

【答案解析】[解析] 细节辨认题。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，增加患心脏病的风险。所以B)“心脏病与人体胆固醇的含量有关”正确。
[避错] 由上面的分析知道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，故排除C)；由原文可知McDonald's和许多其他快餐店的油炸食品在转基因脂肪酸的含量上是很高的，不然McDonald's不会要对其食用油进行更换，并且新的食用油能够降低近一半的转基因脂肪酸的含量。