In London's art gallery six or seven men, mostly in their 30s, are busy painting the walls with new designs in colorful lettering and clever tricks. Tins of spray paint and beer stand on the ground. The atmosphere is not unlike that of a golf course: a mix of concentration and relaxation.

    Graffiti(涂鸦) painting is traditionally a daring hobby. Teenagers avoid security guards to put their names on trains and buses. But over the past decade that has almost disappeared from Britain's cities. Between 2007 and 2017 the number of incidents of graffiti recorded by the British Transport Police fell by 63%. A survey by the environment ministry shows that fewer places are damaged by tags(绘名) than ever. Graffiti are increasingly limited to only a few walls. In time the practice may die out entirely.

    The most obvious reason for the decline in tagging and train-painting is better policing, says Keegan Webb, who runs The London Vandal, a graffiti blog (博客). Numerous cameras mean it is harder to get away with painting illegally. And punishments are more severe. A generational change is apparent, too. Now teenagers prefer to play with iPads and video games. Those who do get involved tend to prefer street art to graffiti. And the internet helps painters win far more attention by posting pictures online than they can by breaking into a railway yard.

    Taggers and graffiti artists mostly grew up in the 1980s and 1990s. Those men are now older and less willing to take risks. "We can't run away from the police any more," says Ben Eine, who turned from tagging to street art. The hip-hop culture that inspired graffiti in the first place has faded. Video games and comic books provide more inspiration than music.

    Graffiti may eventually disappear. But for now the hobby is almost respectable. Mr Eine says he has lots of friends who used to paint trains. Now with wives and children, they paint abandoned houses at the weekend. It has become something to do on a Sunday afternoon—a slightly healthier alternative to sitting watching the football.

    Most people buy a lot of gifts just before Christmas. But some people think we buy too much. They have started a special day called Buy Nothing Day.{#blank#}1{#/blank#}

    Buy Nothing Day is November 29. It's 25 days before Christmas. It's after Thanksgiving and often the first day of Christmas shopping.{#blank#}2{#/blank#}

    The idea for Buy Nothing Day started in Vancouver, British Columbia.{#blank#}3{#/blank#}In California, parents and children get together to read stories, sing songs, and paint pictures. The children talk about why they don't need a lot of toys. This year, in Manchester, England, people dressed up in costumes to tell people that we buy too much.

    In Albuquerque, New Mexico, high school students wanted to tell other students about Buy Nothing Day. They organized a spaghetti dinner to give people information about Buy Nothing Day. {#blank#}4{#/blank#} They made posters and talked to other students about it. {#blank#}5{#/blank#} The students at high schools liked the idea of this new tradition. Next year, they want to have another dinner to tell more people about Buy Nothing Day.

A. They asked restaurants in the neighborhood to donate the food.

B. At this time, we see ads in Newspapers and, on TV telling us to “buy, buy, buy!”

C. Buy Nothing Day has successfully persuaded people not buy anything.

D. Many people think highly of the idea of Buy Nothing Day.

E. They don't want anyone to go shopping on that day.

F. Now people all over the world celebrate Buy Nothing Day.

G. The dinner was a big success, and many students agreed not to buy anything on November 29.

阅读理解

    The “24 solar terms” originated and was firstly used in China. It was created thousands years ago on the basis of practical needs of agriculture. Ancient Chinese people used it to guide agriculture production, special climate signs and even healthy living tips. Last year, the 24 solar terms was added to UNESCO's world intangible cultural heritage list. Now, it has been brought to life thanks to a creative designer from Southwest China's Guizhou province.

    On the eve of this year's Qingming Festival, Shi Changhong released his version of re-produced and pack-aged characters for each solar term in the form of “moving art” of gifs. Since their initial release on Zcool on March 29, the gifs have won great acclaim among the general public and quickly engulfed social media with millions of hits during the festival period.

    To maximize publicity, Shi released his work in three forms: video, animation and picture, while, the background sounds add to the brilliance.

    “When I watch the short video, I can strongly feel the Chinese-style elements hidden in them. And it is really cool to rejuvenate Chinese traditional culture in such a unique way.” WeChat user Xiao Feifei said.

    “It is really a comfort to me to see so many people like my latest work. To be honest, it would really surprise me if the work does not arouse a sensation among Chinese people. The 24 solar items is a deeply mooted concept that encapsulates the essence of Chinese wisdom. However, only a small portion of people know all the names or the correct order of those terms. My intention is to increase Chinese people's self awareness to learn more about our traditional fine culture. Actually, the 24 solar items work is only a part of my whole design program ‘Charm China', which I started over a year ago.” Shi told China Daily.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    Dolphins (海豚) live in a dark underwater world. It's often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.

    Only other dolphins understand what the sounds mean. Scientists haven't uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins — and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.

    Dolphins often hunt by themselves but still need to stay connected to the group. Since they can't always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they're a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.

    What's amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It's creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother's or group members' whistles.

    When the baby dolphin is about a year old, its signature whistle is set. It repeats it often so the other dolphins learn to recognize it.

    Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists are to decipher the rest of dolphins' communication.

    When you visit America, you will see the word Motel on signs and notice boards. It is made up of "motor" and "hotel" and it is really a hotel for people who arrive by car (however, you don't need a car to stay at one). You have to pay when you arrive for your room, which usually has a bath. Meals are not provided, but there will certainly be a cafeteria (自助餐馆). Americans eat a lot of salads and sandwiches. Along the main roads there are a lot of motels. Each tries to offer more than next. Some provide television in every bedroom; others have swimming pools; and so on. Motels are especially useful when you are in the country, far from a town or city. You will also find them in the big National Parks.

    In these great National Parks, you may meet guests you don't expect to see. An American friend told me a little story. In the middle of a moonless night she heard strange noises outside her motel window in the Yellowstone National Park in Wyoming. Thinking it might be a thief, she jumped out of bed, opened the door and crept towards a dark shadow. As she got close, she saw the thief. She was dreadfully frightened: it wasn't a human thief ­ it was a big black bear. The bear was turning over some empty tins with its paw, looking for tasty bits of food. My friend decided to leave that particular thief alone!

    There are also, of course, places called "rooming houses", where they receive lodgers (房客). You will see such signs as Tourists or Rooms Rent, and you could try one of these. A word of warning ­ looking for a room in New York during the tourist season is like looking for gold on the moon!

A recent study has found that using wood for construction instead of concrete (混凝土) and steel can reduce emissions (排放). But Tim Searchinger at Princeton University says many of these studies are based on the false foundation that harvesting wood is carbon neutral (碳中和). "Only a small percentage of the wood gets into a timber (木料) product, and a part of that gets into a timber product that can replace concrete and steel in a building," he says. Efficiencies vary in different countries, but large amounts of a harvested tree are left to be divided into parts, used in short-lived products like paper or burned for energy, all of which generate emissions.

In a report for the World Resources Institute, Searchinger and his colleagues have modelled (塑造) how using more wood for construction would affect emissions between 2010 and 2050, accounting for the emissions from harvesting the wood. They considered various types of forests and parts of wood going towards construction. They also factored in the emissions savings from replacing concrete and steel.

Under some circumstances, the researchers found significant emissions reductions. But each case required what they considered an unrealistically high portion (份额) of the wood going towards construction, as well as rapid growth only seen in warmer places, like Brazil. In general, they found a large increase in global demand for wood would probably lead to rising emissions for decades. Accounting for emissions in this way, the researchers reported in a related paper that increasing forest harvests between 2010 and 2050 would add emissions equal to roughly 10 percent of total annual emissions.

Ali Amiri at Aalto University in Finland says the report's conclusions about emissions from rising demand are probably correct, but the story is different for wood we already harvest. "Boosting the efficiency of current harvests and using more wood for longer lived purposes than paper would cut emissions," he says. "We cannot just say we should stop using wood."