Bad teeth can be painful -- and worse. They can even be deadly. Infections (感染) of the gums (牙龈) and the teeth can cause bacteria (细菌) to go into the blood system. Those bacteria can increase the chance of a heart attack and worsen the effects of other diseases. And adults are not the only ones at risk.
For example, in 2007, doctors in the Washington area said a boy died when a tooth infection spread to his brain. They said it might have been prevented had he received the dental care (牙齿保健) he needed. He was twelve years old.
Experts at the National Institutes of Health say good dental care starts at birth. Breast milk, they say, is the best food for the healthy development of teeth. Breast milk can help slow the growth of bacteria and acid production in the mouth.
But dentists say a baby's gums and early teeth should be cleaned after each feeding. Use a cloth with a little warm water. Do the same if a baby is fed with a bottle. Experts say if you decide to put your baby to sleep with a bottle, only give the child water.
When baby teeth begin to appear, you can clean them with a wet toothbrush. Dentists say it is important to find soft toothbrushes made especially for babies and to use them very gently.
The use of fluoride (氟化物) to protect teeth is common in many parts of the world. For example, it is often added to drinking water supplies. The fluoride mixes with enamel (珐琅质) , the hard surface on teeth, to help prevent holes from forming.
【小题1】Which of the following can be used as the title of the passage?

A．Concerns for Healthy Teeth of the Young

B．Causes of Teeth Problem

C．Importance of Healthy Teeth of All

D．Solutions to Teeth Problem

【小题2】What's the main idea of paragraph 4 and 5?

A．How to develop babies' teeth.	B．How to keep babies' teeth clean
C．Why to protect babies' teeth	D．Why to keep babies' teeth clean

【小题3】The passage indicates that ______.

A．Enamel is most widely used to protect teeth in the world

B．Breast milk can cure babies' bad teeth

C．Bad teeth may affect the health of adults and the young

D．Babies' teeth should be brushed once per day

【小题4】The writer uses the boy's death as an example to show that ______.

A．not only adults but the young may suffer from teeth problem

B．the doctors should be responsible for the case

C．babies with bad teeth can easily die

D．the boy was not fed with his breast milk

Weighed down by study? Pushed to the limit by the fast pace of life ? Frightened by the possible war ? Well, you’re not alone. Men and women in France are seeking relief using the world’s best medicine-----laughter.
In the past year, more than 15 laughter clubs have been set up across the country. People of all ages go to release their stress with an hour group laughs. “People telephoned me and said they have forgotten what it is to laugh. They want to find a place where they can escape all their problems for a while. So they come,” said 40—year—old Jocelyne Le Moan. She usually takes a class of around 60 people through a series of laughter techniques.
Her pupils range from teenagers to 70 years old, but most are middle---aged white collars seeking 60 minutes of relaxation at the end of a busy day. Le Moan takes them through the “Lion Laugh”and the “Laugh Contest”, where participants “speak”to each other in different ways. And instead of talking, they break into fits of laughter. At the end there are 15 minutes of “meditation”, when they lie on their backs and let the laughs burst out of their mouths.
“I love it. It’s an experience that has changed my life. Through it I rediscovered the child’s laugh inside me,”Said Romain Jouffroy, 24. “US President George W. Bush should give it a try. He has lost his laugh,”she joked . Like Jouffroy, many laughter club members find themselves changed into children again, and why not ? The average preschooler laughs up to 400 times a day.
The average adult only a day seven to 15.
The physical benefits of laughter are already well—recognized. Doctors say the act of laughing releases good chemicals into the blood—stream, while the quick breathing that accompanies it helps massage（按摩）the digestive organs and strengthens the heart.
“A full hour is like having your inside go jogging！One finishes out of breath, but feels revitalized（产生新活力. And on top of that , you’ve had a laugh,”said doctor Alexisd’ Estaing.And many participants in Paris also emphasize the psychological benefits. They believe that laughter is a way of making oneself feel more confident.
【小题1】Which of the following is not included among the benefits of laughing?

A．It can make people rediscover their children’s laugh.

B．It can release good chemical into blood streams.

C．It can make you feel self—confident.

D．It can cure the illness of people.

【小题2】The writer suggested that you should_____________.

A．take the world’s best medicine.

B．talk to each other about what troubles you.

C．learn series of laughter techniques.

D．have a good laugh after a busy day.

【小题3】From the passage , we can conclude the following but___________.

A．Jocelyne Le Moan is a teacher of the club.

B．the members are mostly middle---aged white collars.

C．people always need some way to relax in life.

D．laugh freely and everything goes well.

【小题4】Which of the following is not the reason why so many people join the laughter clubs ?

A．Those members feel too much pressure on them.

B．They want to find a place to relax themselves.

C．Laughters help massage the digestive organs.

D．The members don’t know how to laugh.

A friend of mine was in low spirits one day. He usually dealt with this state of mind by avoiding people until the mood passed. But on that day Fred had an important meeting with his boss, so he decided to put on a false front. During the meeting Fred smiled, joked and played the part of a happy, good-natured person. To his surprise, he soon discovered he was no longer depressed. 
Without realizing it, Fred chanced to find an important new principle of psychological research: acting a part can help us feel the way we want to feel — more self-assured in a trying situation, more cheerful when things go wrong.
How can you put this principle to work in your own life? There’s more involved than simply mimicking a few expressions. You have to be systematic about it. Here’s how:
Smile to cheer yourself up.
Relax to reduce anxiety or fear.
Look your best to increase your self-confidence.
Keep cool in a crisis.
Using our bodies and actions to change the way we feel can be a useful tool in helping us through life’s difficult times. As novelist George Eliot wrote more than a century ago, “Our deeds determine us, as much as we determine our deeds.” People who remember that — and act upon it — can only be richer and happier for the experience.
【小题1】In paragraph 1 the underlined phrase “to put on a false front” means ______.

A．to wear a wrong coat

B．to act a part unsuccessfully

C．to show a pretended happy appearance

D．to put on airs

【小题2】According to Paragraph 1, Fred ______before the meeting.

A．had very few spirits

B．had many spirits

C．was in bad mood

D．was in good mood

【小题3】The underlined phrase “mimicking” in Paragraph 3 most probably means ______.

A．learning quickly

B．making faces

C．behaving well

D．imitating others

【小题4】In the last paragraph, the quotation “Our deeds determine us, as much as we determine our deeds” may show that ______.

A．actions speak louder than words

B．the more we do, the happier we are

C．our feeling cannot change our behavior

D．actions are very important for us to beat bad moods for good

Ten years ago I used to be very fit. I rode a bike to work and I got a lot of exercise at weekends. I used to play tennis a lot and go for long walks. In those days I didn’t earn very much. I had a job in an office. It wasn’t a very good job but I had a lot of time to do the things I enjoyed doing.
Then, about eight years ago, I got a much better job. The pay was better, but the hours were a lot longer. I bought a car and drove to work every day. I began to take people out to lunch. And I began to put on weight, too. I stopped playing tennis and going for long walks at weekends because I just didn’t have any time for things like that any more.
There’s a lot of stress in my job. Perhaps that’s why I started drinking more than I used to. For example, I used to have only half a glass of whisky when I got home, but then I started filling my glass to the top, and instead of having one glass, I would have several. I started smoking a lot, too. I never used to smoke at all.
Two months ago I had a heart attack. At first I just couldn’t believe it. Luckily it wasn’t very serious. The doctor advised me to stop smoking and to eat less. He also advised me to work less and get more exercise. But I just haven’t any time! My job takes everything out of me!
Sometimes I wonder if I should get another job. Perhaps I could do something as I used to. But if I do that, I won’t earn as much. I have a family to support. I have to think of them, too. I just don’t know what I should do. What do you think?
【小题1】Compared with ten years ago, what is worse for the author now?

A．His job.	B．His pay.
C．His means of transport.	D．His health.

【小题2】According to the passage, when the author got the better job, which of the following is NOT true?

A．He got higher pay.	B．His working hours weren’t long.
C．He found it very stressful.	D．He had little free time at weekends.

【小题3】After the author had a heart attack, the doctor advised him ____________.

A．not to work any longer

B．to take a long vacation abroad

C．to stop smoking and take exercise

D．not to eat out any more

【小题4】What can we learn about the author?

A．The author is not sure what he should do now.

B．The author has taken the doctor’s advice already.

C．The author has got another new job.

D．The author feels much better now.

The consumer(消费者) plays a very important role in the global efforts to reduce C0₂ emissions(排放). Households use one third of the final energy and produce around two thirds of city waste in the European Union. Besides，housing, food，and private transport make up almost 80％ of environmental pressures. Therefore there’s no doubt that consumers can make a real difference in fighting climate change．
To direct consumers towards more environmentally-friendly decisions，we need clear and simple instructions to guide consumption behavior. Actually, two thirds of consumers find it hard to figure out which products are better for the environment, for 58% Europeans think that many businesses just pretend to be green so as to charge higher prices. Thus industry should work harder to give consumers more information about the carbon footprint of their product. For example, inform customers of products made from materials that are recycled，renewable, and／or less carbon-intensive.
People prefer high-quality products that will last long and won’t go out of style, though they might sometimes cost more, especially in time of crisis. Firms that make durable（持久耐用的） or recyclable products cause people to behave more responsibly, which may help put an end to our “throw-way” culture．
However, it is not enough to remind people of green products. It’s more important to direct people to follow a practical lifestyle model. Regulations(规则) alone cannot achieve this purpose. We call for good business communities to create a loyal group of “sustainable(可持续的) consumers”.
【小题1】According to the passage, the key to going greener globally is    ．

A．to provide enough information about sustainable products

B．to get the government involved in protecting the environment

C．to encourage consumers to make their efforts to live a green way

D．to direct companies to provide environmentally-friendly products

【小题2】The second paragraph tried to tell us that       ．

A．people are buying sustainable products to have a lighter carbon footprint

B．most European consumers lack confidence in making responsible choices

C．companies have done enough to allow consumers to make greener choices

D．companies can make more money by making less carbon-intensive products

【小题3】It’s advised that companies had better       especially in the time of crisis.

A．throw away old materials

B．reduce the cost of production

C．make more durable products

D．replace their products frequently

【小题4】The last paragraph puts emphasis on ___________.

A．the quality of products.

B．the honesty of companies.

C．the government regulations.

D．the importance of lifestyle.

Happiness is contagious (有感染力的), as researchers reported on Thursday.
People with the most social connections — spouses, friends, neighbors and relatives — were also the happiest, the data showed. “Each additional happy person makes you happier,” Christakis said.
“Imagine that I am connected to you and you are connected to others and others are connected to still others. It is this fabric of humanity, like an American patch quilt.”
Each person sits on a different colored patch. “Imagine that these patches are happy and unhappy patches. Your happiness depends on what is going on in the patch around you,” Christakis said.
“It is not just happy people connecting with happy people, which they do. Above and beyond, there is this contagious process going on.”
And happiness is more contagious than unhappiness, they discovered.
“If a social contact is happy, it increases the likelihood that you are happy by 15 percent, ” Fowler said. “A friend of a friend, or the friend of a spouse or a sibling (兄弟姐妹), if they are happy, increases your chances by 10 percent,” he added.
A happy third degree friend — the friend of a friend of a friend — increases a person’s chances of being happy by 6 percent.
“But every extra unhappy friend increases the likelihood that you’ll be unhappy by 7 percent,” Fowler said.
The finding is interesting and it is useful, too, Fowler said.
“Among other benefits, happiness has been shown to have an important effect on reduced mortality (死亡率), pain reduction, and improved cardiac (心脏的) function. So better understanding of how happiness spreads can help us learn how to develop a healthier society,” he said.
The study also fits in with other data suggested in 1984 that having $ 5,000 extra increased a person’s chances of becoming happier by about 2 percent.
“A happy friend is worth about $ 20,000,” Christakis said.
【小题1】It can be inferred that________.

A．happiness spreads as fast and widely as unhappiness

B．unhappiness spreads faster and more widely than happiness

C．happiness spreads faster and more widely than unhappiness

D．the spread of unhappiness has not been studied by researchers

【小题2】Which of the following will increase your chances of becoming happier most?

A．Being in a party with a happy atmosphere.

B．A happy experience of your brother or your parents.

C．A happy trip to a foreign country of your friends.

D．Happiness of your friend’s friend.

【小题3】What does Christakis mean by saying “A happy friend is worth about $ 20,000”?

A．A happy friend can help you bring in a wealth of $ 20,000.

B．A happy friend is a wealth which is worth about $ 20,000.

C．A happy friend increases your chances of being happy by 2%.

D．A happy friend increases your chances of being happy by 8 %.

Imagine your body is like the house you live in．Every day, your family creates rubbish．The rubbish builds up until it is put out for the weekly garbage collection．
Now, say you put three bags of garbage out, but because one of the collectors was away sick, only two bags are collected．You take the leftover bag inside to be put out again next week．The following week you put on another three bags, plus the leftover bag from last week．But again, only two bags are collected．Imagine this cycle is repeated over the following weeks．
This is a simple description of what happens to your body when your kidneys （肾脏）don't work efficiently．Your body is not thoroughly emptied of waste products．Other areas of the body such as blood pressure and red blood cell production are affected and the insidious process that may lead to kidney failure begins．
It's not uncommon for people to lose up to 90% of their kidney function before developing any symptoms．There may be no warning signs. This makes early detection （诊查）difficult．
Kidney's main job is to remove toxins（毒素） and unwanted water from our blood．Every day our kidneys clean an average of 200 litres of blood．Kidney failure may be a gradual and silent process, going unnoticed because there is no obvious pain．
Research shows that more than 35% of the patients requiring dialysis（透析）do not see a kidney specialist before they have to do so．Some risk factors for kidney disease such as age and genetic make-up are out of our control; however, some changes in lifestyle may help prevent kidney damage．Two major risk factors for kidney disease, diabetes （糖尿病）and high blood pressure, have been on the rise over the last few decades．Both conditions are chiefly affected by being overweight and not getting enough exercises, which are the potential (潜在的) risk factors for the kidney disease．
【小题1】The author gives the example of the house we live in to indicate that ______．

A．it doesn't matter much if the waste in our body is not emptied in time

B．our body will not produce any waste if our kidneys work efficiently

C．it's important for our body to empty the waste in time every day

D．it's safe and harmless for our body to keep some waste

【小题2】The underlined word “insidious” in Paragraph 3 means         .

A．smooth and safe	B．apparent and fast
C．gradual and unnoticed	D．long and painful

【小题3】We can infer that when we find some symptoms related to our kidneys,         .

A．the kidney failure begins

B．the kidneys can still work properly

C．we have lost about 10% of kidney function

D．the kidneys may have been seriously damaged

【小题4】How many risk factors of kidney disease are mentioned in the passage?

A．Six.

B．Five.

C．Four.

D．Two.

【小题5】Which of the following helps prevent kidney damage most effectively?

A．Go to see a kidney specialist shortly before dialysis starts.

B．Take enough exercise and make early detection of kidney disease.

C．Try to keep low blood pressure and a stable lifestyle.

D．Go to hospital whenever you find any warning signs.

Remember how great exercise was when you were a little kid? Back then，racing around the playground or skipping rope for hours，you weren't thinking fitness，you were thinking entertainment．But in this age of high-tech home equipment and underused(未充分利用的)gym memberships，the simple joy of jumping rope has been forgotten．Rediscovering it will give you a total-body exercise you can find．
Although considered an excellent form of exercise，jumping rope has never gained widespread acceptance because of two fundamental reasons．First，most people recognize jumping rope as an excellent form of cardiovascular (心血管的) exercise，but they also believe that it is simply too difficult．In other words，they don't think they'll be able to continue jumping for the near 20 minutes that it takes to achieve a beneficial physical result．Second, many view it as somewhat boring and too repetitive-not as something fun or enjoyable．
As a matter of fact，jumping rope can be great fun if you find a proper way to practise it．Instead of doing the usual two-foot bounce over and over again，people good at rope-jumping often change their pattern every 10 or 20 jumps．A single bounce，a double bounce，a skip，a knee-up，side swings，as well as a variety of other easy-to-learn free-style rope-jumping．
Now researchers are learning that jumping rope also prepares the brain for learning．It is an exercise allowing both brain hemispheres(半球)to perform in parallel(并行地)to each other．In short，jumping rope can be a life-long activity requiring little equipment，time and space，yet leading to a much healthier life．
【小题1】From the first paragraph we learn that_______ ．

A．all people now have more advanced equipment

B．jumping rope has disappeared from people's memories

C．racing around the playground was preferred

D．people now like to have exercise in a gym

【小题2】Rope jumping has not spread widely because_______ ．

A．it benefits the cardiovascular system

B．it requires little equipment，time and space

C．it is neither easy nor enjoyable

D．it is considered boring

【小题3】The first sentence in the 3rd paragraph implies_____ ．

A．there are many ways to follow

B．the usual way should not be used

C．the easiest way is always the best

D．there is only one proper way to follow

【小题4】According to the researchers, jumping rope _____.

A．only prepares the brain for learning.

B．is suitable for students only

C．helps both brain hemispheres work together

D．can be dangerous for old people

【小题5】What is the author's attitude towards rope jumping?

A．He is arguing against it.	B．He is sitting on the fence of it.
C．He is in favor of it.	D．He is not clear about it.

Europe’s deadly outbreak of a rare form of E. coli bacteria (大肠杆菌) has brought new attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick?
Of course, one way to avoid these medical mysteries is to keep dangerous organisms out of the food supply. This is easier said than done, but scientists keep looking for new ways.
Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce. These can be sources of E. coli. E. coli bacteria naturally live in the intestines(肠) of humans and many animals. Most kinds of E. coli are harmless but some can make people sick.
The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers.
Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team.
MOON KIM: “We were requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”
The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each piece of fruit.
Moon Kim says the team hopes the system will be available before long.
MOON KIM: “We are targeting for development in commercial plants for the next several years.”
The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.
【小题1】What is the main topic of the text?

A．Bacteria.

B．A high-tech scanner.

C．A camera

D．Food safety.

【小题2】E. coli bacteria ______.

A．broke out all over the world	B．comes from soil or animal waste
C．is extremely harmful to health	D．does not cause illness

【小题3】The high-tech scanner ______.

A．can help to sort out different fruits

B．make the produce appeal to shoppers

C．can only capture images of the whole apple

D．can identify the presence of contaminants

【小题4】What can be inferred from the text?

A．The scanner needs to be improved.

B．The scanner will be available in the next several years.

C．Moon Kim is unwilling to develop the scanner.

D．The scanner is connected to a sorting machine.

What happens inside the skull of a soccer player who repeatedly heads a soccer ball? That question motivated a challenging new study of the brains of experienced players that has caused discussion and debate among soccer players, and some anxiety among those of us with soccer-playing children.
For the study, researchers at the Albert Einstein College of Medicine in New York selected 34adults, men and women. All of the volunteers had played soccer since childhood and now competed year-round in adult soccer leagues. Each filled out a detailed questionnaire developed especially for this study to determine how many times they had headed a soccer ball in the previous year, as well as whether they had experienced any known concussions (脑震荡) in the past.
Then the players completed computerized tests of their memory and other learning skills and had their brains scanned, using a complicated new M.R.I. technique which can find structural changes in the brain that can't be seen during most scans.
According to the data they presented at a Radiological Society of North America meeting last month, the researchers found that the players who had headed the ball more than about 1,100 times in the previous 12 months showed significant loss of white matter in parts of their brains involved with memory, attention and the processing of visual information, compared with players who had headed the ball fewer times.
This pattern of white matter loss is "similar to those seen in traumatic (外伤的) brain injury", like that after a serious concussion, the researchers reported, even though only one of these players was reported to have ever experienced a concussion.
The players who had headed the ball about 1,100 times or more in the past year were also generally worse at recalling lists of words read to them, forgetting or fumbling the words far more often than players who had headed the ball less.
【小题1】The passage is most probably a______.

A．news report	B．research report
C．story for soccer players	D．text for doctors

【小题2】In which way can we find the structural changes in the brain?

A．Computerized test.	B．Questionnaire..
C．Scanning.	D．M.R.I. technique.

【小题3】From the passage we can conclude that frequent heading may have_____.

A．significant effect on brain	B．little effect on one's brain
C．nothing to do with the brain injury	D．one's memory improved

【小题4】What is likely to be the cause of memory loss?

A．Playing soccer frequently.	B．Tests of their memory.
C．White matter loss.	D．Information processing.

【小题5】The underlined word "fumbling" is closest in meaning to______.

A．remembering	B．misunderstanding
C．recalling	D．missing