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Why are people interested in eating raw foods or whole foods? One reason is that eating these types of food reduces the risk of acid accumulation in your body.

Raw and whole foods are usually digested more efficiently than cooked and refined foods. When we cook foods, we destroy the natural enzymes (酶) that are part of the food in its raw form. These enzymes were intended by nature to help us digest the food. When we consume food without these natural enzymes, our bodies either digest the food improperly or allow too many nutrients to be absorbed into the bloodstream. In both instances, the result is obesity. When too many nutrients are absorbed at once, the body grows fat. Improperly digested food moves slowly through the digestive tract, where it becomes increasingly acidic. To protect its vital organs from this acidic waste, the body changes the acid into fat and stores it safely away from the organs.

Processed foods contain chemical elements, which might confuse the appetite mechanism that tells us when we’ve had enough to eat; as a result, people often overeat. Processed foods also upset the digestive cycle. The body will either identify these foods as allergens and then store them safely away from the organs as fat, or the remains of undigested food will become acidic and enter the bloodstream as acid waste, which will stick to the blood vessel walls and block the passage of vital oxygen and nutrients heading for the body’s cells. The body’s metabolism (新陳代謝) becomes inactive, and the result is weight gain and obesity.

The accumulation of acid in the digestive tract makes digestion increasingly inefficient. When that happens, even healthy foods can become acidic and the food allergies will become more common.

To stop this vicious（惡性的） circle in its tracks, people need to consume food and supplements that will neutralize the acid already accumulated in body. Eating the right types of raw and whole foods can help. It’s also important to restore your enzyme balance. You need to identify and avoid the foods that cause acid accumulation and consume the foods that increase enzyme production. If you truly want to change and help your body heal itself, you need to take an active approach.

1.It can be inferred from Para. 2 that __________.

2.Processed foods are unhealthy because they __________.

3.What is the main purpose of this passage?

4.What is likely to be talked about following the last paragraph?

5.What can we learn from the text?

In Daniel Gilbert’s 2006 book "Stumbling(跌撞) on Happiness," the Harvard professor of psychology looks at several studies and concludes that marital(婚姻的) satisfaction decreases after the birth of the first child and increases only when the last child has left home. He also declares that parents are happier grocery shopping and even sleeping than spending time with their kids.
The most recent comprehensive study on the emotional state of those with kids shows us that the term "bundle of joy" may not be the most accurate way to describe our kids. "Parents experience lower levels of emotional well-being, less frequent positive emotions and more frequent negative emotions than their childless peers," says Florida State University’s Robin Simon, a sociology professor.
Simon received plenty of hate mail in response to her research，which isn’t surprising. Her findings shake the very foundation of what we’ve been raised to believe is true. In a recent NEWSWEEK Poll, 50 percent of Americans said that adding new children to the family tends to increase happiness levels. But which parent is willing to admit that the greatest gift life has to offer has in fact made his or her life less enjoyable?
Is it possible that American parents have always been this disillusioned(有幻覺的)? In pre-industrial America, parents certainly loved their children, but their kids also served a purpose—to work the farm, contribute to the household. Today, we have kids more for emotional reasons, but an increasingly complicated work and social environment has made finding satisfaction far more difficult. Raising children has not only become more complicated, it has become more expensive as well. The National Marriage Project’s 2006 report says that parents have significantly lower marital satisfaction than nonparents because they experienced more single and child-free years than previous generations.
As for those of us with kids, all the news isn’t bad. Parents still report feeling a greater sense of purpose and meaning in their lives than those who’ve never had kids. And there are other rewarding aspects of parenting that are impossible to quantify.
【小題1】.
What’s the main idea of the book Stumbling on Happiness?

Greece is one of the most beautiful countries of the world. Millions of tourists visit this place every year.
In Greece the bus is the most convenient and preferred means of traveling. There are intercity buses operated by KTEL that interconnect various cities of Greece, and there are international buses operated by OSE that connect Greece to other European cities.
Every tourist must visit Greece at least once in life. This country is really a vacation heaven. It is the perfect blend(融合) of history and art with adventure and romance. You can dive into deep blue waters, climb up the mountains or enjoy ancient architecture and history.
Buses in Greece are cheap and very comfortable. All bus stations display schedules of buses on every route. Conductors and drivers are very polite and helpful. Travelers never face any trouble locating and boarding buses to their destinations. Tourists can always ask the conductor to inform them about their stop, so that they can get down at the right stop. Everyone here is more than happy to help tourists.
Athens, the capital of Greece, has three bus terminals(終點站). Buses to different parts of Greece leave from different terminals. Air-conditioned express buses also operate between major cities. They are faster and more comfortable than other buses. Tourists can choose guided Greece bus tours. These tours are the perfect way of exploring this great country.
Buses in Greece are also a great way of saving bucks on the journey. The long-distance bus system is very cheap. Buses save a lot of money to cover long distances, cheaper than taxis or cars. They are also the best means of interacting with local people. You can sit next to a native of Greece and get some information about the place.
1. The company KTEL offers bus services         .
A. from Greece to other countries      B. to different cities in Greece
C. to tourist attractions in Greece       D. from Greece to its bordering countries
2. It can be inferred from Para. 3 that the Greeks are        .
A. generous       B. hard-working     C. warm-hearted    D. economical
3. If you are a tourist to Greece from overseas, you’d better choose     .
A. taxis          B. guided Greece bus tours   
C. cars           D. air-conditioned express buses
4. The underlined word “bucks” in the last paragraph probably refers to      .
A.  trouble       B. energy           C. time           D. money

Astronauts aboard the space station celebrated a space first on Wednesday by drinking water that had been recycled from their urine(尿), sweat and water got from air. They said "cheers," clicked drinking bags and toasted NASA workers on the ground.
The urine recycling system is needed for astronaut stations on the moon and Mars. It also will have NASA money because it won’t have to ship up as much water to the station by space shuttles or cargo rockets. Besides, it’s important as the space station is about to expand from three people living on board to six.
The recycling system had been brought up to the space station last November by space shuttles Endeavour, but it couldn’t be used until samples(樣品) were tested back on earth. So when it came time to actually drink up, NASA made a big deal of it. The three-man crew stood holding their drinks and congratulated engineers in two NASA centres that worked on the system.
“This is something that had been the stuff of science fiction,” American astronaut Michael Barratt said before taking a small mouthful. “The taste is worth trying.”
The new system takes the combined urine of the crew from the toilet, moves it to a big tank, where the water is boiled off, and the vapor(水蒸氣) is collected. The rest of the urine is thrown away. Then the water vapor is mixed with water from air, and then it goes through filters (過濾器). When six crew members are aboard it can make about six gallons from urine in about six hours.
“Some people may find the idea of drinking recycled urine distasteful, but it is also done on earth, but with a lot longer time between urine and the tap,” said Marybeth Edeen, the space station’s national lab manager.
The technology NASA developed for this system has already been used for quick water purification after the 2004 Asian tsunami.
【小題1】 According to the text, the recycling system is important because ___________.

Homeownership has let us down. For generations, Americans believed that owning a home was undoubtedly good. Our political leaders hammered home the point. Franklin Roosevelt held that a country of homeowners was “unconquerable.” Homeownership could even save babies, save children, save families and save America. A house with a lawn and a fence wasn’t just a nice place to live in or a risk-free investment; it was a way to shape a nation. No wonder leaders of all political types wanted to spend more than $100 billion a year on subsidies（補助）and tax breaks to encourage people to buy.

But the dark side of homeownership is now all too apparent: Indeed, easy lending stimulated（刺激）by the cult of homeownership may have triggered（引起）the financial crisis. Housing remains a drag on the economy. Existing-home sales in April dropped 27% from the previous month, worsening fears of a double-dip. And all that is just the obvious tale of a housing bubble and what happened when it popped. The real story is deeper and darker still.

For the better part of a century, politics, industry and culture lined up to create a fetish of the idea of buying a house. Homeownership has done plenty of good over the decades; it has provided stability to tens of millions of families. Yet by idealizing the act of buying a home, we have ignored the downsides. In the bubble years, lending standards slipped dramatically, allowing many Americans to put far too much of their income into paying for their housing. And we ignored longer-term phenomena too. Homeownership contributed to the hollowing out of cities and kept renters out of the best neighborhoods. It fed America’s overuse of energy and oil. It made it more difficult for those who had lost a job to find another. Perhaps worst of all, it helped us become casually self-deceiving: By telling ourselves that homeownership was a pathway to wealth and stable communities and better test scores, we avoided dealing with these frightening issues head-on.

Now, as the U.S. recovers from the biggest housing bust（破產(chǎn)）since the Great Depression, it is time to rethink how realistic our expectations of homeownership are—and how much money we want to spend chasing them. Many argue that homeownership should not be a goal pursued at all costs.

1.Political leaders wanted to spend money encouraging people to buy houses because______.

A．owning a home was undoubtedly good

B．homeownership could shape a country

C．houses could save families and America

D．homeownership was unconquerable

2.The underlined sentence in Para. 2 means ______.

A．homeownership has quite a lot of bad effects

B．there might be another housing breakdown in the U.S.

C．the existing-home sales will keep decreasing in the U.S.

D．the result of homeownership is much worse than it appears

3.It can be inferred from Para. 3 that ______.

A．Americans choose to live out of urban areas

B．it is the way to wealth to have one’s own house

C．it is hard for Americans to get a home loan

D．homeownership has made many people out of work

4.What is the author’s attitude towards homeownership?

A．Cautious.          B．Ambiguous.        C．Favorable.         D．Optimistic.