Honey from the African forest is not only a kind of natural sugar, it is also delicious. Most people, and many animals, like eating it. However, the only way for them to get that honey is to find a wild bees' nest and take the honey from it. Often, these nests are high up in trees, and it is difficult to find them. In parts of Africa, though, people and animals looking for honey have a strange and unexpected helper - a little bird called a honey guide.

    The honey guide does not actually like honey, but it does like the wax in the beehives (蜂房). The little bird cannot reach this wax（蜂蜡）, which is deep inside the bees' nest. So, when it finds a suitable nest, it looks for someone to help it. The honey guide gives a loud cry that attracts the attention of both passing animals and people. Once it has their attention, it flies through the forest, waiting from time to time for the curious animal or person as it leads them to the nest. When they finally arrive at the nest, the follower reaches in to get at the delicious honey as the bird patiently waits and watches. Some of the honey, and the wax, always falls to the ground, and this is when the honey guide takes its share.

    Scientists do not know why the honey guide likes eating the wax, but nothing can prevent the birds from making efforts to get it. The birds seem to be able to smell wax from a long distance away. They will quickly arrive whenever a beekeeper is taking honey from his beehives, and will even enter churches when beeswax candles are being lit.

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。

    It was my first day back home since starting college. A lot had changed in the last year. Not with my hometown but with me. I had left as a 17-year-old boy and had now returned as an 18-year-old man. In the city, I was living on my own, had a part-time job and was studying. Even the government recognized I was an adult: I had a driver's license. So here I was, on my summer vacation, walking down the main street with my father, desperate for him to acknowledge how mature I was. When his recognition failed to appear, I took matters into my own hands. “Dad,” I said casually, “I'm thirsty. Let's go for a beer.” It was the first time I'd ever mentioned beer in front of my father, let alone ask him to drink one with me.

    He turned to me with a curious expression on his face. “A beer? Well, 1 guess you're old enough now. Let's go to Sailors' Bar. It's where my cousin Tom, your uncle, used to drink. You remember him, right?”

    I had only some vague recollection of my uncle. He was the black sheep of the family. We didn't talk about him much. What ever happened to Uncle Tom, Dad? I haven't seen him in years,” I said as we continued towards the bar.

     “Neither have I, unfortunately. He was a good kid once. But things changed,” my father said mournfully. As a boy, he explained, there had been no better-behaved boy than Tom. But after leaving school, he moved to the city and fell in with bad company. He started going out every night, drinking in nightclubs and playing cards. Soon he lost everything and had to beg his mum to pay his debts. She agreed on condition that he returned home.

    My dad took a deep breath and continued his tale. "Things settled down for a while. He married a lovely woman, gave up his bad habits. But it didn't last. He was soon back to his old ways. He couldn't resist. He was at Sailors, Bar almost every night. His poor mother died of grief and shame. His wife followed her soon after.

     “What ruined him was alcohol He told me once, when a man begins drinking, he never knows where it'll end. ‘So', Tom warned me. ‘be cautious about your first drink!'

     “He went from bad to worse. Last year Tom sent me a letter saying he had been found guilty of stealing, and sent to prison for ten years.”

    Dad finished talking just as we reached the front door of Sailors' Bar. “Anyway, here we are. Let's go in,” he said. But understood. I put my arm around my father and said, “I'm not thirsty anymore, Dad. Let's go home.”

    Photography is a very popular art form. Anyone with a camera – or a mobile phone – can practice it. A picture communicates in a way that words often can't. As the photographer Destin Sparks put it, "Photography is the story I fail to put into words." And there's no better opportunity to practice the art of photography than during our vacation time.

    Holiday photos have been a part of the culture of travelers for a long time. For decades, vacationers have made sure they've packed a camera along with bathing suits, Hawaiian shirts and sunglasses. A camera is an important holiday item. But over the last 10 years, photography has become much more popular. It's easy to capture (捕捉) still and moving pictures of places of interest, and it's also easy to show off these pictures on social media. Armed with their smart phones, tourists, this year more than ever, are capturing the beauty of our planet.

    Of course, travel companies have caught on to this. Trekksoft has an example of photo-tourism from the United States, a land with a vast choice of beautiful locations. Antelope Slot Canyon Tours in Arizona specializes in tours of the state's famous canyons（峡谷）, which gives photographers the opportunity to capture them on camera.

    Not that any great technology is needed for this: most of the tourists are able to make beautiful images with just their mobile phones. Still, help is on hand from the tour guide for those who aren't great at using their cameras. These tour guides have taken a course in photography in case the skills they've learned would help their customers.

    David Beckham was born in 1975 in London, at a place called Leytonstone. When he was a young boy, his greatest passion was in football. He played it whenever he had the chance. Sometimes he would go and watch a game with his friends. When David Beckham was 12 years old, he won the Bobby Charlton Soccer Skills award. This was an important step forward for this young boy, and it led him to go for a visit to a football training camp in Spain. As a boy he played for schools of Essex and also for his county team.

    In 1991, he became a trainee with Manchester United. This meant that he could practice football as much as he wanted to and play for the highly successful Manchester United Youth Cup team and Under-21 team. In April, 1995 he played his first football league game against Leeds Untied. During 1995 and 1996, David became a regular member of the team and Manchester United won in both football seasons, with David scoring many goals（进球）.

    His goals made him a household name. In the first game of the 1996-1997 season, he scored a surprising goal from beyond the halfway line and became famous overnight. He continued to score astonishing goals, especially from free-kicks. The speed of one of his shots was timed at 157 km/h. He also had the ability to make the ball go from left to right, or right to left, whenever he chose. Goalkeepers were never sure where the ball was going, and it regularly ended up in the goal.

    Giving generously and receiving gratefully make it easier to live happily with others. Yet, why do we have such difficulty accomplishing these things in our relationships? I think people refuse to be generous with others because they fear being used.

    For example, my husband and I have family members who only contact us when they need money. We usually accept their requests, but we rarely receive a “thank you”. Most people would say that my husband and I are being used. But when we give, we shouldn't be giving for the purpose of getting gratitude. Rather, we should be giving because it's a good thing to do.

    Everything that we have, from our ability to wake up each morning to the money in our bank account, is a gift from the world. In return, the world asks us to use these gifts to help others, either by giving them our time or our resources. The good news is that when we live our lives being nice to others, our lives run more smoothly.

    If you're generous, yes, some people will use you. But if you practice being generous, most of your relationships will improve. And at the same time, we should remember to receive gratefully. I truly believe that you cannot say “thank you” enough.

    So often we get lazy about expressing gratitude. Parents can feel unappreciated by their children, and teachers can feel unappreciated by their students. Just because a task is part of someone's job description doesn't mean that you shouldn't thank them for it.

    Words of appreciation make others feel good about themselves like nothing else. It's good for us to say “thank you” because we often need to tell ourselves how lucky we are.

    If you are looking for a way to improve your life, I can give you one: Give generously and receive gratefully.

    Learning is so complex that there are many different psychological theories to explain how people learn. A psychologist named Albert Bandura suggested a social learning theory which shows that observation, imitation (模仿), and modeling play a primary role in this process.

    In Albert Bandura's opinion, people can learn through observation. Observational learning doesn't even necessarily require watching another person join in an activity. We can also learn by reading, hearing, or watching the actions of characters in books and films. However, just observing someone else's actions isn't always enough to lead to learning. Your own mental state also plays an important role in determining whether a behavior is learned or not. In addition, though in many cases, learning can be seen immediately when the new behavior is displayed, yet sometimes we can learn things even though that learning might not be immediately obvious, which means people can learn new information without showing new behaviors.

    Not all observed behaviors are effectively learned. Certain requirements need to be related to the observational learning process. For example, you need to be paying attention. Also your retention is an important part of observational learning as you need to pull up information later and act on it during the process. Once you've paid attention to the model and kept the information, it's time to actually perform the behavior you observed. Further practice of the learned behavior leads to improvement. Finally, you have to be motivated to imitate the behavior that has been modeled.

    Social learning theory have many real-world applications. For example, researchers employ it to look into and understand ways that positive role models can be used to encourage desirable behaviors. Besides, it's also applied in the field of education, and today, both teachers and parents recognize how important it is to model appropriate behaviors.