“In only six days I lost seven pounds of weight.”

“Two full inches in the first three days!”

These are the kinds of statements used in magazine, newspaper, radio and television ads, promising good shapes and new look to those who buy the medicine or the device. The promoters of products say they can shape the legs, slim the face, smooth wrinkles, or in some other way add to beauty or desirability.

Often such products are nothing more than money-making things for their promoters. The results they produce are questionable, and some are dangerous to health.

To understand how these products can be legally promoted to the public, it is necessary to understand something of the laws covering their regulation. If the product is a drug, FDA (Food Drug Administration) can require proof under the Food, Drug and Cosmetic Act that it is safe and effective before it is put on the market. But if the product is a device, FDA has no authority to require premarketing proof of safety or effectiveness. If a product already on the market is a danger to health, FDA can request the producer or distributor to remove it from the market voluntarily, or it can take legal action, including seizure (查封) of the product.

One notable case a few years ago involved an electrical device called the Relaxacisor, which had been sold for reducing the waistline. The Relaxacisor produced electrical shocks to the body through contact pads. FDA took legal action against the distributor to stop the sale of the device on the grounds that was dangerous to health and life.

Obviously, most of the devices on the market have never been the subject of court proceedings (法律诉讼), and new devices appear continually, Before buying, it is up to the consumer to judge the safety or effectiveness of such items.

51.It can be inferred that ads mentioned in the text are_____.

A. objective    B. costly     C. unbelievable    D. illegal

52.The Relaxacisor is mentioned as______.

A. a product which was designed to produce electricity

B. a product whose distributor was involved in a legal case

C. a successful advertisement of a beauty product

D. an example of a quality beauty product

53.The author intends to______.

A. make consumers aware of the promoters’ false promise

B. show the weakness of the law on product safety

C. give advice on how to keep young and beautiful

D. introduce the organization of FDA

54.Which of the following is true according to the text?

A. The court is in charge of removing dangerous products.

B. New products are more likely to be questionable.

C. The production of a device must be approved by FDA.

D. The promoters usually just care about profits.

As you grow older, you’ll be faced with some challenging decisions—like whether to cut class or try cigarettes. Making decisions on your own is hard enough, but when other people get involved and try to pressure you one way or another it can be even harder. People who are your age, like your classmates, are called peers. When they try to influence how you act, to get you to do something, it’s called peer pressure.

Peers can have a positive influence on each other. Maybe another student in your science class taught you an easy way to remember the planets in the solar system. Maybe you got others excited about your new favorite book, and now everyone’s reading it. These are examples of how peers positively influence each other.

Sometimes peers influence each other in negative ways. For example, a few kids in school might try to get you to cut class with them; your soccer friend might try to convince you to be mean to another player and never pass him the ball.

It is tough to be the only one who says “no” to peer pressure, but you can do it. Paying attention to your own feelings and beliefs about what is right and wrong can help you know the right thing to do.

You’ve probably had a parent or teacher advising you to “choose your friends wisely.” Peer pressure is a big reason why they say this. If you choose friends who don’t cut class, smoke cigarettes, or lie to their parents, then you probably won’t do these things either, even if other kids do.

If you continue to face peer pressure and you’re finding it difficult to handle, talk to someone you trust. Don’t feel guilty if you’ve made a mistake or two.

47.For whom is the passage most probably written?

A. Students.       B. Parents.          C. Teachers.     D. Doctors.

48.In the last three paragraphs, the author mainly_____.

A. explains why friendship is so important

B. gives advice on how to deal with peer pressure

C. discusses how peers influence us

D. shows how to make more good friends

49.Which of following may help handle peer pressure?

A. Spending more time with classmates.

B. Taking up more relaxing hobbies.

C. Choosing friends with no bad habits.

D. Helping others who are in trouble.

50.What is the topic of the passage?

A. Friendship.    B. Making decisions     C. Self-confidence     D. Peer pressure

If California were not already so famous for Sillicon Valley(硅谷) and Hollywood, it might be well-known for the groups of water-technology firms in its San Diego County. The reverse-osmosis (RO) spiral module, the technique that supports turning seawater and waste-water into drinkable stuff, began in San Diego in 1964. Today dozens of firms in the area supply many of the world's approximately 13,000 RO plants in places from the Persian Gulf and Israel to Australia and China.

Southern California itself, however, has not so far been a big user of its own technology. This is surprising, given that the whole American south-west faces a water problem. But now as the climate gets warmer and the population increases, there is more agreement that the existing infrastructure, consisting of vast pipes that carry water from the Sacramento Delta in the north and the Colorado River in the east, will not be enough. In places such as San Diego, which has inadequate and salty groundwater and currently imports 90% or its water, the answers must be greater conservation, reusing as much water as possible, and getting most of the rest from the sea.

The first part, conservation, has been widely accepted by the public. San Diego today uses less water with a larger population than it did in 1989, the year water consumption peaked. The second part, water recycling has been a hard sell, because of an unpleasant factor. Americans still use the term “toilet-to-tap” for recycling, even though properly treated waste-water is nowadays completely clean. Singapore made its programme acceptable in part by renaming it as NEWater.

This is where desalination comes in, which means taking the salt out of salt water. A firm called Poseidon Resources is now close to building the biggest desalination plant in America behind a power station by the beach in Carlsbad. The power plant sucks in 304m gallons of seawater a day for cooling, so Poseidon plans to change 104m gallons a day by using the RO spiral module.

Lots of people like the idea. Once fully running in 2015, the plant could produce 10% of the region's water. And there are plans for more desalination plants. Many places would need to take much less water from the endangered Colorado River. But a few people hate it a lot. Joe Geever, an expert in biology, says desalination uses too much energy and that Poseidon plant would kill too much sea life. He understands that there is a role for desalination, he says, but would rather not have it right there, right now, and on this scale.

43.Which of the following is WRONG about the RO spiral module according to the passage?

A. This technology is not widely used in its birthplace.

B. Today there are about 13,000 RO plants in the Persian Gulf, Israel, Australia and China.

C. This technology can be used in desalination plants to make sea water drinkable.

D. It is a promising water treatment technology welcomed by a lot of people.

44.How many solutions to the water problem in San Diego are mentioned in the article?

A. 2.  B. 3.  C. 4.  D. 5.

45.What can we infer from the article?

A. The Colorado River is the main water source for California.

B. Americans still use the term “toilet-to-tap” for recycling water.

C. NEWater serves as a brand for recycled clean water in Singapore.

D. Poseidon Resources stands for the power station by the beach in Carlsbad.

46.What is Joe Geever's attitude toward building a large desalination plant at present?

A.Supportive.  B. Negative.  C. Optimistic.  D. Vague.

Catch yourself daydreaming while washing the dishes again? If this happens often you probably have a pretty capable working memory and a sharper brain, new research suggests.

This mind wandering, it seems, actually gives your working memory a workout. Working memory is the mental work space that allows the brain to juggle multiple thoughts at the same time. The more working memory a person has, the more daydreaming they can do without forgetting the task at hand.

Researchers studied groups of people from the University of Wisconsin-Madison community, ranging in age from 18 to 65. The volunteers were asked to perform simple tasks, like pressing a button every time they took a breath or clicking in response to a letter popping up on a computer screen; these tasks were so easy that their minds were likely to wander, the researchers figured.

The researchers checked in periodically, asking the participants if their minds were on task or wandering. When the task was over, they measured each participant's working memory capacity by having them remember letters while doing math questions. Though all participants performed well on the task, the researchers noticed that the individuals who indicated their minds had wandered more than others also scored higher on the working memory test.

“What this study seems to suggest is that, when circumstances for the task aren't very difficult, people who have additional working memory resources allocate them to think about things other than what they're doing,” said Jonathan Smallwood, a study researcher of the Max Planck Institute for Human Cognitve and Brain Science.

When our minds run out of working memory, these off-topic thoughts can take the main stage without us consciously meaning them to; for instance, arriving at home with no memory of the actual trip, or suddenly realizing that they've turned several pages in a book without understanding any of the words.

“It's almost like your attention was so absorbed in the mind wandering that there wasn't any left over to remember your goal to read,” study researcher Daniel Levinson, said in a statement.

People with overall higher working memory were better able to stay focused when the task at hand required it. Those who had low working memory often had their thoughts drift away from the task, and did less well at it.

The findings add to past research suggesting these mind drifts can be positive moments. For instance, daydreaming has often been associated with creativity—researchers think that our most creative and inventive moments come when daydreaming. It's likely that the most intelligent among us also have high levels of working memory, Levinson noted.

40.The word “juggle” in the second paragraph can be replaced by “________”.

A. handle  B. search  C. understand  D. distribute

41.What can be concluded from Jonathan Smallwood's words?

A. People who often have daydreams probably own a pretty capable working memory.

B. On the working memory test, people with wandering minds will get high score.

C. Absorbed in the mind wandering, your attention left no space for your goal.

D. Dealing with some easy jobs, people with higher working memory will daydream.

42.What is the best title of the passage?

A. Mind drifts are always positive.

B. Daydreaming is good for the mind.

C. Creative moments come with working memory.

D. The more daydreaming, the more effectively one works.

Dear NMAI(National Museum of the American Indian) Supporter,

Old stereotypes(思维定式) die hard. And when it comes to the way Native Americans have been viewed throughout history and continue to be viewed today, the stories about life in Indian Country are sadly overshadowing the truths. Most Native Americans don't live in tipis(圆锥形帐篷), and we don't greet one another by saying,  “How.”

To combat misconceptions like these, I need help from people who understand there's more to Native American cultures than the offensive cartoons that you see in movies and television.

I think that you might be one of these people.

Please join NMAI today and enjoy exclusive benefits like our full-color quarterly magazine American Indian, and Members-only discounts at all Smithsonian, NMAI Museum Stores, and at our Zagat-rated Mitsitam Native Foods Café.

Plus, through this email, you can take advantage of our special price of $22-more than 10% off our regular membership charge.

With your support, the National Museum of the American Indian can tell the story both past and present of Native life and culture in North, Central, and South America.

In just one visit to either of our Museums in Washington, DC, or New York City, you can watch a performance by traditional Native dancers... attend a lecture by a leading voice from the world of Native literature... spend an afternoon taking an informative audio tour of the Museum's distinctive grounds... and try your hand at Native crafts like pottery and beadwork. And for those who are unable to visit the museums in person, much of our extensive collection of more than 800,000 objects is cateloged on our website.

Only with your generosity can we share the Native story, awaken children to an interest in Native culture, and bring the Museum experience to people who can't travel to our Museums in person.

By joining the Museum today, you will take the first step in putting an end to the old stereotypes and long-held prejudices that have contributed to an incomplete picture of Native traditions and accomplishments.

Sincerely,

Kevin Gover

Director

36.What is the author's intention in writing this letter?

A. To call for more people to join in volunteer work.

B. To carry out researches on Native Americans.

C. To invite more people to be members of the museum.

D. To raise more donations for the museum.

37.Which of the following statements describes the life and culture of Native Americans correctly?

A. They are good at pottery and beadwork.

B. Most of them live in tipis.

C. They greet others by saying, “How.”

D. They like designing offensive cartoons.

38.If you join NMAI, you can enjoy the following benefits except ________.

A. free full-color quarterly magazine American Indian

B. Members-only discounts at all Smithsonian

C. Members-only discounts for buying in NMAI Museum Stores

D. a free meal at Zagat-rated Mitsitam Native Foods Café

39.Regular membership fee  of the NMAI is about ________.

$30  B. $20  C. $15  D. $25

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