54. 答案：K. prevent
【解析】：
根据上下文可以判断需要选择动词原形，该句话中的these指代上文的“经常性肌肉紧张和关节僵硬”，下文中提到“通过让肌肉更强壮和使关节润滑”，可知动词应该为prevent“预防，阻止”。因此正确答案为K. prevent。
55. 答案：L. principle
【解析】：
根据上下文可以判断需要选择名词与general“一般的，大体的”搭配，根据后文可知选择principle“原则”。因此正确答案为L. principle。
56. 答案：C. briefly
【解析】：
根据上下文可以判断需要选择副词来修饰动词stretch“伸展”，根据句意“只要身体保持某个姿势有一定时间了，用反向的姿势稍微伸展一下身体是很有用的”。可知briefly“短暂地;简要地”符合文意。因此正确答案为C. briefly。
Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on Sheet 2 with a single line through the center.
Passage One
Questions 57 to 61 are based on the following passage.
Junk food is everywhere. We’re eating way too much of it. Most of us know what we’re doing and yet we do it anyway.
So here's a suggestion offered by two researchers at the Rand Corporation: Why not take a lesson from alcohol control policies and apply them to where food is sold and how it’s displayed?
"Many policy measures to control obesity (肥胖症)assume that people consciously and rationally choose what and how much they eat and therefore focus on providing information and more access to healthier foods," note the two researchers.
"In contrast," the researchers continue, "many regulations that don't assume people make rational choices have been successfully applied to control alcohol, a substance -- like food -- of which immoderate consumption leads to serious health problems."
The research references studies of people’s behavior with food and alcohol and results of alcohol restrictions, and then lists five regulations that the researchers think might be promising if applied to junk foods. Among them:
Density restrictions: licenses to sell alcohol aren't handed out unplanned to all comers but are allotted (分配)based on the number of places in an area that already sell alcohol. These make alcohol less easy to get and reduce the number of psychological cues to drink.
Similarly, the researchers say, being presented with junk food stimulates our desire to eat it. So why not limit the density of food outlets, particularly ones that sell food rich in empty calories? And why not limit sale of food in places that aren’t primarily food stores?
Display and sales restrictions: California has a rule prohibiting alcohol displays near the cash registers in gas stations, and in most places you can’t buy alcohol at drive-through facilities. At supermarkets, food companies pay to have their wares in places where they're easily seen. One could remove junk food to the back of the store and ban them from the shelves at checkout lines. The other measures include restricting portion sizes, taxing and prohibiting special price deals for junk foods, and placing warning labels on the products.
注意：此部分试题请在答题卡2上作答。
【总评】这是一篇讨论控制垃圾食品消费的议论文。文章介绍了Rand公司两位研究人员的建议：即借鉴控酒措施的经验，对售卖此类食品的地点和方式进行控制。文中具体介绍了这么做的原因以及一些具体条例。
57. What does the author say about junk food?
A) People should be educated not to eat too much.
B) It is widely consumed despite its ill reputation.
C) Its temptation is too strong for people to resist.
D) It causes more harm than is generally realized.
答案：C . Its temptation is too strong for people to resist.
【解析】推理题。由关键词Junk food定位至文章第一段。由“Junk food is everywhere. We're eating way too much of it. Most of us know what we're doing and yet we do it anyway.(垃圾食品无处不在，这样的食品我们吃得实在是太多了，我们大多数人都知道我们在做什么，但是我们还是在这么做)”可知，垃圾食品对人们的诱惑实在是太强了，以至于人们无法抵挡。选项B中的“ill reputation”在文中没有提到，所以，正确答案为C。