"You see someone just sitting there, looking like they're stupid," explains teenager Manny Logan excitedly. "You just run up to them, slap(掌击) them and run off. It's funny."

    The 16-year-old Logan was describing "happy slapping". It's supposed to be fun but it's a new problem in Britain. Young people will attack passers-by while their friends record the whole thing on camera phones. It was first reported in south London six months ago. But, the practice has spread to other parts of the country and videos of attacks have become popular on the Internet.

    The young people are called "hoodies" because they usually wear a sweatshirt with a hooded top. The top can be used to cover the head or face.

    One study in England published earlier this year suggested that as many as one in four teenagers is an active offender. That includes both serious crimes and small acts like not paying for a bus ticket.

    The fear of youth crime has left some parts of towns empty of ordinary people.

    So, the British government declared war on public disorder last week. The Prime Minister has supported a decision by the country's biggest shopping centre in southeast of England to ban teenagers wearing hooded tops. The clothing helps troublemakers hide from the centre's cameras.

    This week, the government is going further. It plans to force teenage offenders to wear orange jackets while they do public service. The idea is to shame them in front of others.

    But some teenagers and experts have complained that, in their rush to stop the hoodies, politicians risk tarring all teenagers with the same brush.

    Light travels at a speed which is about a million times faster than the speed of sound. In one second, light travels about 300,000 km, but sound travels only 344m. You can get some idea of this difference by watching the start of a race. If you stand some distance away from the starter, you can see smoke come from his gun before the sound reaches your ears. This great speed of light produces some strange facts. Sunlight takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays（光线）left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light which you can see from it tonight started to travel towards you four years ago at a speed of nearly 2 million km per minute. In some cases the light from one of tonight's stars started on its journey to you before you were born.

    Thus, if we want to be honest, we cannot say “The stars are shinning tonight.” We have to say, “The stars look pretty. They were shining four years ago but their light has only just reached Earth.”

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。

    The news of Harper Lee's second novel broke the internet. Go Set a Watchman would be published in July. Lee became a recluse (隐士)after the publication of her first book, To Kill a Mockingbird, in 1960. Although the author has been out of the public eye for more than 50 years, the wave that followed the announcement showed her novel's beloved place in the American literary works.

    In 1991, The Book of the Month Club and the library of Congress conducted a survey that made readers identify books that had made a difference in their lives. Lee's book followed only The Bible. Alongside the works of Shakespeare and Twain, To Kill a Mockingbird remains one of the most widely taught books nationwide, reaching an estimated 70% of American public schools. What makes it such a perfect read for young people?

    English class is a place where young Americans come to know themselves. In the folds of dusty books, students can make contact with humanity beyond the superficial(肤浅的) conversations of the school hallways. Literature promises relief, a place to figure out one's problems and get to know oneself better.

    To Kill a Mockingbird particularly distinguishes itself in this regard. It speaks in child's voice without treating its readership as children. People have called it an 'impossible' achievement, a children's book penned in the prose(散文) of a well-educated adult—it's unlikely that a child like Scout could exist in the real world. But that's exactly what makes it such a charming read for young people. It alludes to (转弯抹角地说到)the consciousness of a well-educated adult going through difficult realities, but shows it through the light and playful voice of a curious little girl.

    A Scientist turns out to be able to see the future by offering each of some four-year-olds a piece of candy and watching how he or she deals with it. Some children reach eagerly for the treat they see. Some last a few minutes before they give in. But others are determined to wait until the last moment.

    By the time the children reach high school, something remarkable has happened. A survey found that those who as four-year-olds had enough self-control to hold out generally grew up to be more popular, adventurous, confident and dependable. The children who gave in to temptation early were more likely to be lonely, easily frustrated and inflexible.

    Actually, the ability to delay reward is a sign of emotional intelligence which doesn't show up on an IQ test.

    The hardware of the brain and the software of the mind have long been scientists' concerns. But brain theory can't explain what we wonder about most, like the question why some people remain upbeat in the face of troubles that would sink a less resistant person.

    Here comes the theory of Daniel Goleman, writer of Emotional Intelligence: when it comes to predicting people's success, brain ability measured by IQ may actually matter less than the qualities of mind once thought of as "character".

    EQ is not the opposite of IQ. What researchers have been trying to understand is how they work together; how one's ability to handle stress, for instance, affects the ability to concentrate and put intelligence to use. Among the ingredients for success, researchers now generally agree that IQ accounts for about 20%; the rest depends on everything from social class to luck.

    While many researchers in this relatively new field are glad to see emotional issues finally taken seriously, some few fear EQ invites misuse.

    Some young Cambodians are learning a new sport — skateboarding. The country's first skateboard park is located on the grounds of a local charity group at the edge of Phnom Penh, the capital.

    Sports like Khmer boxing and soccer are wildly popular in Cambodia. But Chea, who has been skating for 6 months, says skating has already become his favorite sport.

    The skaters are learning tricks like launching off a jump or half-pipe and flying through the air on their narrow wooden boards.

    A non-governmental organization called Skateistan Cambodia organizes weekly programs at the park. Skateistan started its work in Afghanistan years ago. Rory Burke is working with the group which expanded to Cambodia last year.

    Rory Burke points out, "Yeah, it's definitely not a typical Cambodian pastime (消遣). And I think the idea of 'why skateboarding is that it's not been done before here. We want to use skateboarding as something saying, 'Hey, this is new, this is something different. And that kind of itself becomes a little bit of hook. People see it and they think and they say, "Wow, 'what is that?', and they want to get involved. "

    Skateistan partners with local groups that work with young people. The park is on the grounds of the group known as PSE, where children attend school and learn a trade. There are almost one hundred twenty participants. They all come from troubled lives.

    Seventeen-year-old Sang Rotha is a student at PSE. "Sometimes I don't do well on subjects like math," he says, "I feel bad when I find it hard to keep up with my lessons. So that is why I skateboard—to improve my bad feelings. "

    He says he began skateboarding more than a year ago. Before he started training, it seemed very easy. But it was very difficult to learn tricks, and he got hurt a lot from falling off.

    Rory Burke says learning to deal with the difficulties is part of the lesson for these young skateboarders.

    The 2019 Beijing Horticultural Expo, the largest of its kind, has chosen the theme "Live Green, Live Better". The expo, opened on April 29 in Yanqing District of Beijing, is scheduled to last for 162 days until October 7.

    Tickets available

    *Standard day ticket

    *Designated day ticket

    *Discounted ticket

    *Group ticket

    Designated days

    *Labor Day holiday (May 1-4)

    *Dragon Boat Festival holiday (June 7-9)

    *Mid-Autumn Festival holiday (Sept 13-15)

    *National Day holiday (Oct 1-7)

    Tickets prices

    *Standard day ticket: 120 yuan

    *Ordinary designated day ticket: 160 yuan

    *Discounted standard day ticket: 80 yuan

    *Discounted designated day ticket: 120 yuan

    Tickets are free for children under the age of six or shorter than 130 centimeters. Discounted tickets are available for those with disabilities, seniors (people aged at 60 or above), children, students and PLA soldiers.

    Where to buy

    Visitors can buy or book tickets from two online agents, seven travel agencies, or three event channels—the event WeChat account, the event app or Onsite ticket kiosks.

Opening hours

Requirements

    Buying tickets for Expo 2019 Beijing requires real-name registration, and all visitors are required to input information from their ID cards (or valid passports, mainland travel permits for Hong Kong and Macao residents, and mainland travel permits for Taiwan residents) to buy or book tickets online.