阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项

    The average（平均的）American child spends three to five hours a day watching TV. In 1961, the average child began to watch television at age three; however, today it is nine months. Yet, most parents think that television has bad influence on their children. For example, in the early 1970s, my parents believed that my bad eyesight was the result of sitting too close to the screen, and they therefore made my stay at least six feet from it. Today, most people have no such worry, but many new ridiculous (荒谬的) sayings have appeared:

      *TV makes kids stupid. Many children watch more educational programs when they are pre-schoolers. When they grow up, they can read more books and have much better ideas to solve difficult problems than other children.

     *TV makes kids violent. The real story is not so simple. Hundreds of studies show that watching violence on TV makes children more aggressive (好斗的). But a study of over 5,000 children also finds that some positive programs make children kinder. The problem is that kids are increasingly watching shows with violence instead of those suitable for their age.

      *Sitting around watching TV makes kids overweight. An experiment finds that when children watch less television, they do lose extra weight; however, reducing their television time does not make them more active. The real problem lies in snacking (吃零食). A widespread habit for kids, and junk-food advertisements.

      *TV helps kids get to sleep. The opposite is true. The more television children watch, the more likely they are to have irregular sleep and nap (小睡) patterns. Allowing kids to watch television is part of the problem, not the solution.

Do's and Don'ts in Whale (鲸) Watching

    The Department of Fisheries and Oceans has developed guidelines for whale watching in Johnstone Strait, where killer whales are found on a daily basis each summer. It is strongly recommended that vessel (船只) operators follow these guidelines for all kinds of whales.

•Approach whales from the side, not from the front or the back.

•Approach no closer than 100 metres, then stop the boat but keep the engine on.

•Keep noise levels down — no horns, whistles or racing of engines.

•Start your boat only after the whales are more than 100 metres from your vessel

•Leave the area slowly, gradually moving faster when you are more than 300 metres from the whales.

•Approach and leave slowly, avoiding sudden changes in speed or direction.

•Avoid disturbing groups of resting whales.

•Keep at low speeds and remain in the same direction if traveling side by side with whales.

•When whales are traveling close to shore, avoid crowding them near the shore or coming between the whales and the shore.

•Limit the time spent with any group of whales to less than 30 minutes at a time when within 100 to 200 metres of whales.

•If there is more than one vessel at the same observation spot, be sure to avoid any boat position that would result in surrounding the whales.

•Work together by communicating with other vessels, and make sure that all operators are aware of the whale watching guidelines.

    The government says spending £4.2 million on planting trees in towns and cities will improve the quality of people's lives. But do trees really make people happy?

    Some British and US surveys suggest a thick green lawn, or well-landscaped yard can increase the government property prices by as much as 15%. But the government's Big Tree Plant campaign, which aims to plant one million trees in English urban areas over the next four years, says trees are not only good for our bank balance, but they do wonders for our happiness. And it says getting people to plant makes communities even happier. So do people really care about trees and do they improve lives? Margaret Lipscombe, director of urban programs at the Tree Council, says, “Not only are trees beautiful but they are practical. Trees also encourage healthier lifestyles and studies have shown people are calmer when trees are in their community,” A US study suggests that patients who have a view of nature through hospital windows recover better after operations.

    Ms. Lipscombe says that the trees have also been known to slow down the traffic because drivers will go more slowly when there is something in their sights. She admits some people have negative feelings about trees because they worry about slipping on berries, bird droppings on cars or blocked light.

    Ms. Lipscombe also says when she first moved into the area, there were no trees on her street. “I t was an area where there were lots of factories with high walls. It looked like an abandoned place that you didn't want, especially as a woman on your own. Now everything is different. With lots of trees around, the street looks more attractive. People are not as frightened and no longer run down the road to get home. The trees also bring people out onto the street and make a stronger community feel.”

    Tens of thousands of ancient pictures carved into the rocks at one of France's most important tourist sites are being gradually destroyed. Scientists and researchers fear that the 36,000 drawings on rocks in Mont Bego in the French Alps are being damaged so rapidly that they will not survive for future generations.

    The mountain, believed to have once been a site for prayer, is scattered (散布) with 4,000-year-old drawings cut into bare rock. They include pictures of cows with horns, cultivated fields and various gods and goddesses. But as the popularity of the site increases, the pictures are being ruined by thoughtless graffiti (涂鸦).

    Jean Clottes is the chairman of the International Committee on Rock Art. He says, "People think that because the pictures have been there so long they will always continue to be there. But if the damage continues at this rate there will be nothing left in 50 years."

    He describes seeing tourists stamping on the drawings, wearing away the rock and definition (清晰) of the artwork as they do so. Some visitors, he says, even cut off parts to take home as souvenirs. "When people think they can't take a good enough photograph, they rub the drawings to get a clearer picture," he said. "The drawings are polished by the weather, and if the sun is shining and the visitors can't see them properly they simply rub them to make them look fresher." Other researchers describe how people arrive carrying long sticks with sharp ends to scratch (刮) their own drawings, or even their names, in the rocks.

    But experts are divided over the best way to preserve the drawings. Henry de Lumley, director of the Museum of Natural History in Paris, believes that the only way to save the site is to turn the whole mountain into a "no-go" area, preventing the public from going there except on guided tours. Otherwise, he says, not only will the site be completely destroyed but important research work will be reduced.

    Clottes disagrees, "The measure suggested by Henry de Lumley is the most severe, and while it is the most effective, it is also certain to bring about protests from people who live there," he said. "The site was classified as a historic monument years ago by the Ministry of Culture, and we must do as much as possible to save what is there."

    David Lavergne, the regional architect, also wants to avoid closing the site. "Henry de Lumley's idea isn't ideal," he said. "Our department feels that the best solution is to let people look at the site, but because the area is very big it is difficult to prevent visitors from damaging it. I would prefer that everyone was able to look at it, but the main problem is money. We do not have the funds to employ the necessary number of guards. We may have to consider charging a fee. It doesn't seem to be possible to get the government support."

Rick Guidotti put aside his career as a fashion photographer to turn his lens（镜头） to people living with genetic, physical and behavioral differences.

He says what changed his perception（看法） of beauty was a chance encounter with an albino （患白化病的） girl."I was just tired of people telling me who was beautiful. Every season that face would change but I was always told who was beautiful. As an artist, I don't see beauty just on covers of magazines. I see it everywhere. So that was my original intention—that opened my eyes a little wider and wider."

Guidotti has created Positive Exposure, a not-for-profit organization that uses photography and video to transform public perceptions and promote a world where differences are celebrated. Guidotti and Positive Exposure are featured in a new documentary called On Beauty.

One of the women featured in the film is Jayne Waithera. "I never thought I was beautiful because nobody said that to me, but meeting him was my profound moment. I remember that particular day. He took my picture and I felt so good like I felt there's somebody who, like, really loves me and sees me for who I am and who sees me more than my condition."

Guidotti is travelling from city to city to promote On Beauty. He says his tour is not about money; it's about the message. "As I travel from community to community, I'm taking photographs and I'm empowering（给某人……的权力） individuals with a positive sense of who they are. They're seeing beauty in their reflection but I'm also empowering their families and they in turn are empowering their communities as well. All is based on the philosophy of change—how you see, how you change."