"Exercise may be the best treatment of chronic pain," say doctors at a new clinic for dealing with pain, "People with chronic pain need to stop lying around, go out more, and start exercising." The instinctive reaction to acute pain is to stop moving and to try to protect the source of pain. But it seems that this is often not productive, especially in the case of back pain. Back pain, after headaches and tiredness, has become the third most common reason for people to visit their doctors. Painful backs now account for millions of days off work.
Lumbar(腰部的) pains are partly the price humans pay for taking their forelimbs off the ground, but they are made worse by a sedentary(久坐不动的) lifestyle. Lack of exercise slowly decreases the flexibility and strength of muscles, so that it is more difficult to take pressure off the site of pain. Exercise is essential. It releases endorphins(内啡肽), the body's "feel-good" chemicals, which are natural painkillers. In fact, these are so important that researchers are now looking for drugs that can maintain a comfortable level of endorphins in the body.
Most people who go to a family doctor complaining of pain are prescribed pain-killing drugs rather than exercise. Since finding the cause of backache is not so easy, doctors frequently do not know the precise cause of the discomfort, and as the pain continues, sufferers end up taking stronger doses or a series of different drugs. "It's crazy," says Dr. Brasseur, a therapist at the International Association for the Study of Pain. "Some of them are taking different drugs prescribed by different doctors. I've just seen a patient who was taking two drugs which turned out to be the same thing under different names."
A generation of new pain clinics now operates on the basis that drugs are best avoided. Once patients have undergone the initial physical and psychological check up, their medication is cut down as much as possible. Taking patients off drugs also prepares them for physical activity.
In some pain-relief clinics, patients begin the day with muscle contraction and relaxation exercises, followed by an hour on exercise bikes. Later in the day, they practice tai chi (太极), self-defense, and deep thought. This compares with an average of two-and-a-half hours' physiotherapy(理疗) a week in a traditional hospital program. "The idea is to strengthen and to increase long-lasting energy, flexibility, and confidence," explains Bill Wiles, a consultant pain doctor in Liverpool. "Patients undergoing this therapy get back to work and resume healthy active lifestyles much sooner than those subjected to more conservative treatment."
16. To treat pain, patients should stop moving around.
A. Right B. Wrong C. Not mentioned
17. Headaches are partly caused by lack of exercise.
A. Right B. Wrong C. Not mentioned
18. Exercise helps to take the pressure off the site of pain.
A. Right B. Wrong C. Not mentioned
19. Doctors often use drugs such as endorphins to treat patients.
A. Right B. Wrong C. Not mentioned
20. Exercise helps pain sufferers to recover more quickly than traditional treatment.
A. Right B. Wrong C. Not mentioned
21. Exercise helps pain sufferers to recover more quickly than traditional treatment.
A. Right B. Wrong C. Not mentioned
22. New pain clinics ask patients to give up drugs completely.
1 Dreams play an important role in our lives. If they can be correctly interpreted, we can come to understand ourselves better. Here, we look at four common dreams and what they potentially symbolize.
2 I can see their laughing faces…laughing at me. But they aren't as smart. If they were, they'd be up here flying with me! This dream has both positive and negative connotations(涵义). On the positive side, the dream may express a strong desire to travel and get away from everyday routine. It can be interpreted as a powerful desire to achieve. On the other hand, this dream can mean the person has a problem or is afraid of something and they wish to escape. The dream could represent an inferiority complex(自卑情结), which the dreamer attempts to escape from by putting themselves up above others.
3 I'm moving fast now, but it's still behind me. Doesn't matter how fast I go, I still can't escape. Although this is a traditional symbol of health and vitality(生命力) like the first one, it can also suggest the dreamer is trying to escape from danger. Usually, fear is the dominant emotion. By running hard, the dreamer can possibly escape the threat. However, they can also stumble(蹒跚) or worse still stop moving altogether. This makes the fear even more terrifying(恐怖的). One possible interpretation suggests that the person is under pressure in their everyday life.
4 1'm sweating and my heart is beating. I'm trapped in my own bed. In this dream, the person is often standing on a high, exposed place such as on the top of a tower, or on the edge of a cliff. The overwhelming (强烈的) feeling changes from anxiety to a loss of control. There is nothing to stop the person, and the feeling as they go over the edge can be horrifyingly (恐怖地) real. Fortunately, just before hitting the ground, the dreamer awakens with a sense of enormous relief. This dream suggests that the dreamer is afraid of losing control and has a fear of failure or even death.
5 The wind is pushing me and I slip. There's nothing I can do . . . nothing I can hold on to. This symbol is associated with fear: suddenly the dreamer loses all power of movement. They try hard to move their arms and legs，but they simply cannot. Frozen in a terrifying situation with no escape，they become more and more terrified as the seconds go by. Another frequent context for this dream is failing to do something in public, often something which you are normally very good at, such as your job. Not only is this extremely embarrassing, but it also shows a deep-seated phobia (恐惧) of losing a job and a livelihood.
23. Paragraph 2_______
24. Paragraph 3________
25. Paragraph 4________
26. Paragraph 5_______
A Dream of diving into the water
B Dream of running hard
C Dream of falling down
D Dream of flying into the air
E Dream of being pushed away
F Dream of climbing trees
27. If a person puts himself up above others in the dream, he may____.
28. If a person dreams of being chased by others, he may ____.
29. If a person dreams of going over the edge of a cliff, he may ____.
30. If a person dreams of failing to do something in public, he may _ ___.
A be under pressure in everyday life
B feel tired in real life
C be afraid of losing his job in real life
D feel lonely in everyday life
E feel inferior in reality
F be afraid of losing control in real life
第一篇 Cell Phones: Hang Up or Keep Talking?
Millions of people are using cell phones today. In many places it is actually considered unusual not to use one. In many countries, cell phones are very popular with young people. They find that the phones are more than a means of communication-having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professional worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.
On the other hand, why do some medical studies show changes in the brain cells of some people who use mobile phones? Signs of change in the issues of the brain and head can be detected with modern scanning (扫描) equipment. In one case, a traveling salesman had to retire at a young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.
As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often
31 People buy cell phones for the following reasons EXCEPT that
A they're popular
B they're useful
C they're convenient
D they're cheap
32 The world "detected" in paragraph 3 could be best replaced by
33 The salesman retired young because
A he couldn't remember simple tasks
B he disliked using mobile phones
C he was tired of talking on his mobile phone
D his employer's doctor persuaded him to
34. On the safety issue of mobile phones, the manufacturing companies
A hold that the amount of radiation is too small to worry about
B deny the existence of mobile phone radiation
C develop new technology to reduce mobile phone radiation
D try to prove that mobile phones are not harmful to health
35 The writer's purpose of writing this article is to advise people
A to buy mobile phones
B to use mobile phones less often
C to update regular phones
D to stop using mobile phones
第二篇 Preventing Child Maltreatment(虐待)
Child maltreatment is a global problem with serious life-long consequences. There are no reliable global estimates for the prevalence (流行) of child maltreatment. Data for many countries, especially low-and middle-income countries, are lacking.
Child maltreatment is complex and difficult to study. Current estimates vary widely depending on the country and the method of research used. Nonetheless, international studies reveal that approximately 20% of women and 5%-10% of men report being sexually abused as children, while 25%-50%of all children report being physically abused. Additionally, many children are subject to1 emotional abuse(sometimes referred to as2 psychological abuse).
Every year, there are an about 31,000 homicide(杀人) deaths in children under 15.This number underestimates the true extent of the problem, as a significant proportion of deaths due to child maltreatment are incorrectly attributed to falls, bums and drowning.
Child maltreatment causes suffering to children and families and can have long-term consequences. Maltreatment causes stress that is associated with disruption in early brain development. Extreme stress can impair the development of the nervous and immune systems. Consequently, as adults, maltreated children are at increased risk for behavioural, physical and mental health problems. Via the behavioural and mental health consequences, maltreatment can contribute to heart disease, cancer, suicide and sexually transmitted infections.
Beyond the health consequences of child maltreatment, there is an economic impact, including costs of hospitalization, mental health treatment, child welfare, and longer-term health costs.
A number of risk factors for child maltreatment have been identified. These risk factors are not present in all social and cultural contexts, but provide an overview when attempting to understand the causes of child maltreatment.
It is important to emphasize that children are the victims and are never to blame for maltreatment. A number of characteristics of an individual child may increase the likelihood of being maltreated, such as being either under four years old or an adolescent, being unwanted, or failing to fulfill the expectations of parents and having special needs, crying persistently or having abnormal physical features.
36 International studies reveal that
A many children have been neglected.
B child maltreatment is most serious in developed countries.
C 20% of children have been sexually abused.
D 25%-50% of girls have been physically abused.
37 The word "underestimates" in paragraph 3 means
B points out.
38 Child maltreatment can bring all the following consequences EXCEPT
C heart disease.
D poor memory.
39 Children are more likely to be maltreated if they
A cry a lot.
B are not good-looking.
C are over 4 years old.
D are quiet.
40 We can infer from the passage that
A researchers have collected enough data on child maltreatment.
B more than 31,000 children under 15 are killed every year.
C many countries have set up special institutions for maltreated children.
D some children are also to blame for maltreatment.
第三篇 Sprained (扭伤) Ankle
One of the most common injuries teenagers and adults experience is a sprained ankle. A sprain occurs when the ligaments(韧带) of a joint are twisted(扭伤) and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position. A sprain can occur from a sudden twisting at the joint, or a stretching or tearing of the fibers of the ligaments. The injured area usually swells(肿胀) and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an ankle on fire! If you cannot walk without experiencing intense pain, you must seek medical help. If the pain is manageable, and you can walk, here are three words to help you remember how to treat yourself:
As soon as there is injury to that ligament, there will be a certain amount of bleeding under the skin. Once the blood pools around the damaged blood vessels, swelling occurs. The pressure from the swelling results in additional stress and tenderness to the region. In order to reduce the degree of swelling, lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart. Next, to reduce blood distribution and keep bleeding(流血) to minimum, apply a cold pack. After 20 minutes, take the pack off, wait half an hour, and then reapply. This can be several times a day for a total of three days.
Never leave a cold pack on for more than 20 minutes at a time. Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature! Therefore, one accidentally triggers(引起) more blood distribution to the affected area by leaving a cold pack on for too long! Finally, bandage the angle. Be careful not to wind it too tightly; doing so can restrict blood flow and cause harm to the entire foot.
41. A sprain is caused by
A ligament fibers of a joint being twisted
B blood vessels being hurt in the foot
C constantly changing body temperature
D elevating one's ankle
42. The black-and-blue symptom of a sprain is due to
A bleeding under the skin
B pressing one's ankle
C a tight bandage
D applying a cold pack
43 The word "it" in paragraph 2(line5) refers to
44. Once the initial cold pack is removed, what is to be done?
A Begin bandaging the ankle
B Wait 30 minutes and then reapply the ice pack for 20 minutes
C Keep the ankle in a position lower than your heart
D wait 20 minutes and then reapply the ice pack for 30 minutes
45. The main idea of the passage is to explain
A how a sprain occurs
B how to bandage an injured foot
C how to treat a sprained ankle
D how to reduce the temperature of a wounded area.
When you turn on the television or read a magazine, celebrities (名人) are everywhere. Although fame and the media play such major roles in our lives today, it has not always been that way. ____ (46) Many historians agree that Charles Lindbergh was one of the first major celebrities, or superstars.
Lindbergh was born in Detroit, Michigan, in 1902, but he grew up in Little Falls, Minnesota. As a child, he was very interested in how things worked, so when he reached college, he pursued a degree in engineering. At the age of 20, however, the allure(诱惑) of flying captured Lindbergh's imagination. ____ (47) Soon after, Lindbergh bought his own plane and traveled across the nation performing aerial stunts(空中特技).
In 1924, Lindbergh became more serious about flying. He joined the United States military and graduated first in his pilot class. ____(48)
During the same time, a wealthy hotel owner named Raymond Orteig was offering a generous award to the first pilot who could fly nonstop from New York City to Paris, France. The Orteig Prize was worth $25, OOO - a large amount even by today's standards.
Lindbergh knew he had the skills to complete the flight, but not just any plane was capable of flying that far for that long. ____ (49)
On May 20, 1927, Charles Lindbergh took off from Roosevelt Field in New York City and arrived the next day at an airstrip (简易机场) outside Paris. Named in honor of the sponsor, The Spirit of St. Louis carried Lindbergh across the Atlantic Ocean and into the record books. He became a national hero and a huge celebrity.
When he returned to the United States, Lindbergh rode in a ticker-tape (热烈的) parade held to celebrate his accomplishment. was even named for Charles Lindbergh-the kept at the Smithsonian Institute's National Air ____ (50) A very popular dance Lindy Hop. Today, The Spirit of St. Louis is and Space Museum in Washington, D.C.
A Eighty years' ago, radio and movies were just beginning to have that kind of effect on Americans.
B Working with an aviation company from San Diego, California, and with financial help from the city of St. Louis, Lindbergh got a customized (定制的) airplane that could make the journey.
C He also received a Medal of Honor, the highest United States military decoration.
D He quit school and moved to Nebraska where he-learned to be a pilot.
E His childhood was not full of fond memories.
F Lindbergh used this additional training to get a job as an airmail pilot, flying out of St Louis, Missouri.
Food Safety and Foodborne Illness
Food safety is an increasingly important public health issue. Governments all over the world are intensifying their efforts to (51) food safety. These efforts are in response to an increasing number of food safety problems and (52) consumer concerns.
Foodborne illnesses are defined as diseases, usually either infectious or toxic (有毒的) in nature, caused by agents that (53) the body through the ingestion of food. Every person is risk of foodborne illness.
Foodborne diseases are a widespread and growing public health (55),both in developed and developing countries. The global incidence of foodborne disease is difficult to ____ (56), but it has been reported that in 2005 alone8 million people died from diarrhoeal (腹泻) diseases. A great proportion of these ____ (57) can be attributed to contamination (污染) of food and drinking water. Additionally, diarrhoeal is a ____ (58) cause of malnutrition(营养不良) in infants and young children.
In industrialized countries, the percentage of the population suffering from foodborne diseases each year has been ____ (59) to be 10 up to 30%.In the United States of America, for example, around 76 million cases of foodborne diseases, resulting____ (60)325,000 hospitalizations and 5,000 deaths. are estimated to occur each year.
____ (61) less well documented, developing countries bear the brunt (首当其冲) of the problem due to the presence of a wide ____ (62)of foodborne diseases, including those caused by parasites(寄生虫). The high prevalence of diarrhoeal diseases in many developing countries suggests major ____ (63) food safety problems.
In partnership with other stakeholders, WHO is developing ____ (64) that will further promote the safety of food. These policies ____ (65) the entire food chain from production to consumption and will make use of different types of expertise(专长).
51 A meet B improve C provide D reach
52 A following B careful C rising D immediate
53 A find B govern C enter D push
54 A with B for C at D in
55 A interest B problem C service D benefit
56 A compare B estimate C explain D reduce
57 A factors B products C cases D countries
58 A natural B major C similar D just
59 A imagined B acknowledged C considered D reported
60 A to B in C from D of
61 A As B Since C Hence D While
62 A range B distance C order D arrangement
63 A prevailing B spreading C troubling D underlying
64 A policies B methods C programs D systems
65 A form B set C cover D break
1 A confess 这个动词是"坦白、交代、承认"的意思，admit 也是"承认"的意思，两个词后面都可以跟用 that 引导的宾语从句，在这个句子里可以换用
2 D extract 作动词用是"获得、获取"的意思，在四个选项中只有 obtain 具有这样的意 义，又如: extract help, extract satisfaction, extract information 等。
3 B accelerate 这个动词原意是"加速"，如: The trains have been accelerated. 火车提速 了；The steps to implement the plan are being accelerated. 执行该计划的步伐正在加速。在本句中 accelerate his sale of shares（加速出售他的股票），无疑就是增加出售他的股票的意思，故选 increased。
4 D motive 是"动机" 的意思，the motive for (doing) something即为 "做某事的动机"，reason 是"理由"，the motive for the murder 和 the reason for the murder 是同一意思。
5 C impact 和 influence 是同义词，也解释"影响"，又如: the impact of modern technology on interpersonal relationships 现代技术对人际关系带来的影响。
6 D shine 这个动词通常用于表示"发亮、发光"的意思，如: The sun is shining。但是如 果和皮鞋一起用，那就是"擦皮鞋、把皮鞋擦亮"的意思了。本句的意思是：他的皮鞋擦得一尘不染。polish 具有"把……擦亮、磨光"的意思，clear 和 shoes 一起用的话便是"把鞋子移开"的意思了. wash 则是用水洗，mend 是修补的意思。
7 C exp]ore 是"探索、探险、摸索"的意思。 investigate 除了常用的"调查"这层意思外，也具有"探索"这样的意义。本句的意思是：在会议上我们探索了扩充的可能性。
10 B framework 就是我们现在常常说的 "框架"，within the existing legal framework指在现有的法律框架内。所谓法律框架实际上就是指法律体系，所以选 system。 limit 是限制，procedure 是程序, status 是地位。
11 D find fault with something/someone 是个固定的表达式，意为"找在、吹毛求疵"，所以和 criticize（批评）基本同义。
12 A spectacular 这个形容同常用来描述场面、景观等，意思是"壮观的、壮丽的、华丽的"等。在四个选项中只有 magnificent 具有这样的意思。
13 B grasp 这个动词是"抓住"的意思，可用于具体的事物，如：grasp the rope/my hand 抓住绳索/抓住我的手，也可以用于抽象的概念，如: grasp the main idea/his meaning 抓住要点/理解他的意思。在本句中 grasp the significance of what had happened 就相当于 under stand the significance of what had happened。
14 C convert 的意思是"改变、转化"。turn 则是具有同样意义的一个更为常用的单词，两者后由都跟 into 来表示"变为……"。又如：Solar energy has been successfully converted/ turned into mechanical energy. 太阳能被成功地转化成机械能。The priest converted/turned him from Buddhist into a Christian. 那神父把他从一个佛教徒变成了个基督徒。reduce 减少，reform 改造。
15 D tolerate但是"忍受"的意思，如：tolerate the heat 忍受酷热，tolerate the loneliness 忍受孤独，tolerate the humiliation 忍受屈辱。和它同义的词常用的有 bear ，endure 和 stand。
16 B 短文第一、二句已明确回答这个问题，病人需要stop的是 lying around，而不是 moving around。
17 C 短文自始至终都没有提到引起头痛的原因是什么。
18 A 第二段中间说到，缺乏运动就难以减少疼痛部位的压力，所以需要运动。
19 B 第二段最后一句说，研究者们目前正在寻找能够使身体中维持理想水平的内啡肽药物，因此它不可能是现在医生经常开给病人的药。
20 A 第三段第二句说到，因为找出背痛的原因很困难，所以背痛病人最终只能服用更大剂量或几种不同的药物。
21 A 最后一段列举了许多让病人进行身体活动的方法，并在最后一句指出，这样治疗的病人要比传统治疗恢复得更快。
22 B 第四段说到，他们只是在要求病人进行身体活动的基础上尽量减少服药，或者最好避免服药，而没有要求病人完全停止服药。
23 D 第二段说，做梦者看见他们的笑脸，可是他们却不像做梦者那么机灵，否则也可以像做梦者那样在太空中飞翔。
24 B 第三段说，做梦者不管跑多快，那个东西仍然会紧随其后，无法逃脱。
25 C 第四段说，做梦者大汗淋漓，心跳加快，躺在床上无法动弹，似乎就是站在塔顶上或悬崖边缘.幸亏落地之前清醒过来。
26 E 第五段说，做梦者被大风吹倒，手脚都不听使唤，也就是自己已经完全无能为力了。
27 E 第二段最后一句说的就是做梦者想要高人一头时可能代表的却是自己在现实生活中的自卑情结。
28 A 第三段中做梦的内容是被人追赶却始终逃脱不掉，最后一句说，这可能意味着做梦者在日常生活中可能感受到某种压力。
29 F 第四段第二句说，做这种梦时做梦者常常梦见自己站在塔顶上或悬崖边缘，最后一句 说这可能表示做梦者害怕无法控制自己、害怕失败甚至死亡。
30 C 第五段最后两句说到，做梦者梦到，本来自己完全能干的事情，在大庭广众面前却干不了，这可能代表做梦者害怕丢失工作岗位的心情。
31 C 本题的答题依据是文章开头的这句话：Everyone has imagination, but most of us, once we become adults, forget how to access it. 人人都有想象力，只是成年后，我们就忘了如 何取得想象力 （access it）。文章的目的就是教给成年人几种获得想象力的技巧，所以说成年人还是可以学会怎么样更加富有创意的。
32 B 从第二段的这两句话 First, think about the problem you have to solve or the job you need to do. Then find an image, word, idea or object, for example, a candle. 可以找到答案。蜡 烛只是一个例子。
33 A 第三段的第一句话 Imagine that normal limitations don't exist. You have as much time/space/ money, etc. as you want. 是本题的答题依据。
34 B put yourself in their shoes 是英语的一个成语，相当于汉语的"设身处地"。
35 C 第三种技巧就是Look at the situation from a different point of view. 作者举了谈判者和小说家为例。推销员如要成用这一技巧就应该把自己置于顾客的位置上，问一问他们的需要是什么。
36 A 回答此题时需要对第一段、第二段进行综合分析。短文中说，没有确切可靠的数字，那也就只能是 many children 了。其他三个选项都与短文的叙述不符。
37 D 该词在本句中的意思是"低估"，选项D的意思是"错估"，词义相近，其他三个选项的词义与之相去甚远。
38 D 第四段中提到虐待儿童的后果时，除 D 项外，其他 A、B、C 三个选项都被提及。
39 A 短文最后一句说到儿童被虐待的可能性更大时提到了 A 项，而 B、D 两项均未提及，C项则是将原文的 under 换成 over，故是错误的。
40 B 第三段说，每年大约有 31,000名 15 岁以下的儿童惨死于被虐待，但这个数字被低估了，可见不应低于这个数字。其他三个选项短文都没有提到。
41 A 短文第二句就明确说到，踝部损伤是由于关节韧带扭伤（可能还被撕裂）所引起的。
42 A 第一段中部说到，受伤部位通常出现肿胀并变成蓝黑色，第二段第一句则说，韧带受伤时皮下就会出血，可见选项 A 是正确答案。
43 A it 所在的句子说，为了减轻肿胀的程度，伤者就要尽快躺下并将踝部抬高，让官高于心脏。可见这里的"它"指的就是"踝部"。
44 B 第二段后半部说到，为了减轻血流并尽量减少出血，可以进行冷敷。20 分钟后取下， 等半小时后再做冷敷。
4S C 通读全篇短文，选项 A 才能概括它的主题（或主旨），其他三个选项只是它的部分内容而已。
46 A 第一段是文章的引言，说的是当今有了电视和杂志这样的媒体，名人到处可见，但是情况并非一向如此，80 年前收音机和电影才刚开始对美国人产生这样的效应，也就是 才能向美国的公众介绍宣传Lindberg 使他成为名人。
47 D 这个空挡的前一句说的是Lindberg 在大学读工程学位，但是飞行吸引了他的想象；其后的一句则讲他自己买了飞机在各地表演空中特技，所以在中间自然应该填入他辍学并移居到 Nebraska 去学习飞行这句话。
48 F 前一句说Lindberg 参牢，在飞行员班里第一个毕业，这样正好接上Lindbergh used this additional training to get a job as an airmail pilot，flying out of St. Louis，Missouri. 这句话。
49 B 前面一句讲了 Lindberg 觉得要完成这次飞行自己的技术没有问题，但并非任何一架飞机都能飞这么远。所以下面就接上他找到了San Diego 的一家飞行器公司定做了一架飞机。
50 C 六个选项中只有这个选项是和他回到美国后得到的荣誉有关的。
51 B 目前，食品安全不是完全没有保障，而是还有问题，需要改善，因此选择 B 项合适。
52 C 因为食品安全问题越来越多，消费者自然越来越关心。
S3 C 空白处应该是that 引导的定语从句，修饰agent，它本身在定语从句中作谓语，其 宾语是body，而四个选项中只有 enter 从逻辑上、从上下文意思上最恰当。
54 C 空白处后面的 risk 起着很好的提示作用，at risk of 是表示"处于.....危险之中"的词组。
55 B 只有填上 B 项句子才能说得通。
56 B 根据上下文意思，此处显然想说"全球发生率难以估计"，其他三个选项都不合适。
57 C case有 "病例、病人"的意思，前一句说到800万人死于腹泻，所以选择它最恰当。
58 B 四个选项中只有 major 是唯一可供选择的选项。
59 D 四个选项中只有 C、D 可以考虑，但是后面的句子举出美国的例子，列出了具体的数字，所以还是选择 D 项更恰当。
60 B 四个选项中只有 B、C 可与动词 result 搭配，但意思却是相反的。result in 是"导致……结果"，而 result from 则是"由……引起的"，根据后面列出的住院人数和死亡人数，还是B 项合适。
61 D 根据上下文意思还是While 比较恰当，因为While 具有"虽然"的意思。"虽然文献资料不多，但是发展中国家仍然首当其冲"。As和 Since 是说明原因的，Hence 则是引起 结果的，均不合适。
62 A 四个选项中只有 range 可供选择。a wide range of 表示"范围很广的"，其他三个选项都不合适。
63 D "发展中国家之所以腹泻病人很多就是食品安全存在很多问题"，因此 D 项正符合上 下文意思。