Directions: Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words.

Youth sport has the potential to accomplish three important objectives in children's development. First, sport programs can provide youth with opportunities to be physically active, which can lead to improved physical health. Second, youth sport programs have long been considered important to youth's psychosocial development, providing opportunities to learn important life skills such as cooperation, discipline, leadership, and self-control. Third, youth sport programs are critical for the learning of motor skills; these motor skills serve as a foundation for future national sport stars and recreational adult sport participants. When coachers develop activities for youth practices and when sport organizations design youth-sport programs, they must consider the implication of deliberate play and deliberate practice.

Research from Telama （2006） states that regular participation in deliberate play or deliberate practice activities during childhood and youth （ages nine to eighteen） increases the likelihood of participation in sports during adulthood by six times for both males and females. Côté （2002） defines deliberate play activities in sport as those designed to maximize enjoyment. These activities are regulated by flexible rules adapted from standardized sport rules and are set up by the children or by an involved adult. Children typically change rules to find a point where their game is similar to the actual sport but still allows for play at their level. For example, children may change soccer and basketball rules to suit their needs and environment （e.g. in the street. on a playing field or in someone's backyard）. When involved in deliberate play activities, children are less concerned with the outcome of their outcome of their behavior. （whether they win or lose） than with the behavior. （having fun）.

           On the other hand, Ericsson （1993） suggests that the most effective learning occurs through involvement in highly structured activities defined as deliberate practice. Deliberate practice activities require effort, produce no immediate rewards, and are motivated by the goal of improving performance rather than the goal of enjoyment. When individuals are involved in deliberate play, they experiment with different combinations of behaviors, but not necessarily in the most effective way to improve performance. In contrast, when individuals are involved in deliberate practice, they exhibit behavior. focused on improving performance by the most effective means available. For example, the backhand skills in tennis could be learned and improved over time by playing matches or by creating fun practice situations. However, players could more effectively improve their backhand performance by practicing drills that might be considered less enjoyable. Although drills are used in most effective means available practice might not be the most enjoyable, they might be the most relevant to improving performance.

（Note: Answer the questions or complete the statements in NO MORE THAN TEN WORDS）

    Your next car might drive itself. After years of trials on city streets, driverless vehicles are now nearing the live phase. Last moth, a driverless bus began carrying passengers through Lyon, France, Most in the automobile industry think self-driving vehicles will be on the road by 2020 or before.

    Driverless cars will at first be huddled with human-driven cars. But the first places where they will become dominant（统治的）are dense urban areas — precisely the spots most damaged by the automobile age. Many advanced cities are already reducing the role of human-driven cargo. Driverless cars will quicken that process and will bring us enormous benefits.

    Driverless cars will reduce accidents by around 90 percent. That's big—the annual death toll on the world's roads is about 1.2 million a year. Pollution and carbon emissions will drop, because urban driverless cars will be electric. The old, otherwise they would stay at home most of the time and the disabled and teenagers will suddenly gain mobility.

    On the other hand, driverless cars will bring catastrophe. The best thing about the automobile age was that it employed tens of millions of people to make, market, insure and drive vehicles. Over the next 20 years, the mostly low-skilled men who now drive trucks, taxis and buses will see their jobs reduced. Carmakers are especially scared. The few cars of the future might be made by tech companies such as Apple, Baidu and Google. Imaging the impact on Germany, where the automotive sector is the largest industry.

    Dramatic change is coming, and driverless cars could arrive by 2020. But governments have barely begun thinking about it. Only 6 percent of the biggest US cities have factored them into their long-term planning.

    A decade ago anyone hardly saw the Smartphone coming. It has bought an epidemic of mass addiction. Let's hope we do a better job of handling the driverless car.

    After 21 years of marriage, my wife woman out to take another woman out to dinner and a movie. The other woman was my mother, who has been a widow(寡妇)for 19 years. However, the demands of my work and my three children had made it possible to visit her only occasionally.

    That Friday after work, when I arrived at her house, my mother was waiting in the door with her coat on. She had curled her hair and was wearing the dress that she had worn to celebrate her last wedding anniversary.

    We went to a restaurant that, although not elegant, was very nice and comfortable. My mother took my arm as if she were! The First Lady. During the dinner, we had an agreeable conversation about nothing extraordinary but just caught up on recent events. We talked so much that we missed the movie.

    As we arrived at her house later, she said: "I'll go out with you again, but only if you let me invite you." I agreed. A few days later, my mother died of a serious heart attack. It happened so suddenly that I didn't have a chance to do anything for her.

    Sometime later, I received an envelope with a copy of a restaurant receipt (收据）from the same place mother and I had dined. An attached note said: I paid this bill in advance. I wasn't sure that I could be there; still, I paid for two plates—one for you and the other for your wife. You will never know what that night meant for me. I love you. Son."

    At mat moment, I understood the importance of saying: UI love you" and of giving our loved ones the time they deserve. Nothing in life is more important than family. Give family members the attention they deserve, because these things cannot be put off till some "other' time.

    In 1988, after being diagnosed with kidney cancer, Fenn, a high-end gallery owner, came up with a crazy plan: He would bury some of his favorite artifacts somewhere in the Rocky Mountains and then die next to them. "My desire was to hide the treasure and let my body stay there and go back to the soil," he explains.

    The contents are worth somewhere between $I million and $5 million. Then he took his treasure chest out into the Rockies and hid it.He wanted it to be found. But he wasn't going to just give it away.

    In 2010, Fenn self-published a book, The Thrill of the Chase, which includes a 24-line poem that Fenn claims contains nine clues that "will lead to my treasure."

    At first, nobody really noticed. But word spread, and the chase was on.(The book is now out of print, and copies show up on Amazon for as much as $3,200.) Fenn estimates that 350,000 people from across the globe have searched or are currently searching for his treasure. Yet nobody has found it.

    The problem with Fenn's poem is that the "clues" can be interpreted a million different ways. The "home of Brown," for instance, could be Browns Canyon National Monument in Colorado, or Brown Hill in New Mexico. Or a cabin or a bear.(Don't laugh; several people have already looked.)

    "It's all in the poem," some have recently started sharing more details," and the treasure isn't in a mine, I mean, they have snakes in' em. It's between 5,000 feet and 10,200 feet above sea level. It's not in Canada or Idaho or Utah or a grave-yard."

    Why are Fenn's treasure hunters so into what seems like a ridiculous thing to do with their time? Many are quick to say that their lives have been enriched by their experiences. "It's changed us," Neitzel says. "made us more confident, and even saved our marriages. Nothing scares us anymore." They thank Fenn for giving them a reason to take a risk, for giving their lives meaning. Many claim that even if they found Fenn's chest, they wouldn't necessarily spend the money—and might even rehide the chest. Another hunter had this tantalizing insight: "I hope that I never find the treasure. The journey will be treasure enough."

    And so the hunt continues.

    There are billions of people on this planet, and many of us love to eat meat. Can the demand be filled in a sustainable(可持续的) and affordable way? A bunch of businessmen are not only optimistic but are working to make this happen sooner than you may think.

    The environmental effects caused by meat consumption (食用)—waste, animal treatment, health problems and even the greenhouse gas effects that are potentially caused by methane gas produced by cows—have given rise to a number of startups(新兴公司)looking to develop meats in different ways.

    For example, San Francisco-based Memphis Meats is developing cell-based meats in its labs without requiring any animals. Israel's Future Meat Technologies is doing the same by producing fat and muscle cells that are being tested by chefs in Jerusalem. All of these companies use special processes to harvest cells from animals and grow them in a lab.

    But don't worry if you're not a meat lover. Startups such as Jet Eat, which is also based in Israel, are working on food products grown in labs that are plant-based and replicate (复制) meats using natural elements while still keeping flavor, consistency and the "overall sensory experience", according to a report on NoCamels. Jet Eat, which was founded in early 2018, aims to 3D-print their lab-grown products by 2020.

    As you can imagine, there are plenty of barriers facing the industry. Educating the public is a big one. Another controversial issue is the labeling of the products. Recently both the USDA and the Food and Drug Administration (FDA) announced that they will begin jointly controlling the new "cell-based meat" category.

    Many of us have concerns about the challenges facing future generations as our global population increases and the earth's natural resources decreases. The good news is that there are plenty of businessmen around the world—like those producing lab-grown meats—who are working to solve some of these problems and make a little money in the process. Nothing wrong with that.