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    An Englishman was showing a foreign visitor around London.“What's that strange building?” asked the visitor.“That's the Tower (塔) of London.”“I see. How long did it take to build it?”“About 500 years.”“In my country we can build it in a few months.”said the visitor. After they came to St. Paul's Cathedral (大教堂), the visitor asked the same question. “Nearly forty years,”said the Englishman. “In my country we finish it in forty days at most,” said the visitor. This went on all day. They visited most of the best known buildings in the city. Every time they saw a new one, the visitor asked what it was and how long it took to build it. Then he said they could do the same thing much faster in his country. At last the Englishman got angry with the visitor though he tried not to show it. Several days later they came to the House of Parliament (议会) and the visitor asked his usual question, “What's that?” The Englishman answered, “I have no idea. It wasn't there last night.”

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    When most 8-year-old children are in school or playing, little Anna Wang from China is looking after her grandmother and great-grandmother.

    The family lives in a poor house in the remote mountains(偏远山区) of Huling, Rui'an. Her mother and father leave her when she is only 3 months old. She has a grandmother and a 92-year-old great-grandmother. Her grandmother is ill(生病的), so she can't look after herself. Anna cooks for them, and helps them with housework every day. Every morning, she gets up early and cooks breakfast for her family. She often cleans the house, and helps them to the toilet(厕所). She has no other family to help her.

    A neighbor(邻居), Lin Feng, with a farm usually gives Anna vegetables, and he helps her carry them to her home. Sometimes he even buys clothes for her and her family. Also Lin Feng teaches her to read and write.

    Little Anna says she does the housework happily because she wants to. She always says "I should be ready to help my family and other people because we should love everyone all over the world."

    Some people are sharing their experience of being a volunteer. Now let's have a look.

    Mrs. Liu lives in the countryside, and she doesn't know Guangzhou very well. One day, she goes to Guangzhou, but she can't find her way. Just then, she sees a man near the bus stop. "I can ask him the way." She says to herself. Then she goes over to the man and asks, "Excuse me, will you please tell me the way to Zhongshan Road?" The man smiles with no words. He doesn't know Chinese. He is Japanese. Then he puts his hand into his pocket (衣袋) and takes out a piece of paper and lets Mrs. Liu look at it. On the paper are these words, "Sorry, I can't speak Chinese."

    When I was 17, I read a magazine article about a museum called the McNay, once the home of a watercolorist named Marian McNay. She has requested the community to turn it into a museum upon her death. On a sunny Saturday, Sally and I drove over to the museum. She asked, "Do you have the address?'", but I'll recognize it, there was a picture in the magazine."

    "Oh, stop. There it is!"

    The museum was free. We entered, excited. A group of people sitting in the hall stopping talking and stared at us.

    "May I help you?" a man asked. "No," I said. "We're fine." Tour guides got on my nerves. What if they talked a long time about a painting you weren't that interested in? sally had gone upstairs. The people in the hall seemed very nosy (爱窥探的) ,keeping their eyes on me with curiosity. What was their problem? I saw some nice sculptures in one room. Suddenly I sensed a man standing behind me. "Where do you think you are?" he asked. I turned sharply. "The McNay Art Museum!" he smiled, shaking his head. "Sorry, the McNay is on New Braunfels Street." "What's this place?" I asked, still confused. "Well, it's our home." My heart jolted (震颤) .I raced to the staircase and called out." Sally! Come down immediately!"

    There's some really good stuff (艺术作品) up there." She stepped down, looking confused. I pushed her toward the front door, waving at the family, saying, "Sorry, please forgive us, you have a really nice place "Outside, when I told Sally what happened, she covered her mouth, laughing. She couldn't believe how long they let us look around without saying anything.

    The real McNay was splendid, but we felt nervous the whole time we were there. Van Gogh, Picasso. This time, we stayed together, in case anything else unusual happened.

    Thirty years later, a woman approached me in a public place. "Excuse me, did you ever enter a residence, long ago, thinking it was the McNay Museum?"

    "Yes. But how do you know? We never told anyone."

    "That was my home. I was a teenager sitting in the hall Before you came over, I never realized what a beautiful place I lived in. I never felt lucky before. You thought it was a museum. My feelings about my home changed after that. I've always wanted to thank you."

    On most weekends, you can find Zoe Stone. 8. in front of a computer. But she isn't playing games or watching videos. She's learning how to write code.

    Code is a set of instructions (指令). It tells a computer what to do. Coders are the people who write the instructions for a computer. Coders make websites or apps. Apps can be used for everything from playing games to checking the weather. Coders solve problems and work together. They know how to think big and small.

    Zoe began to learn coding when she was 4 years old. She uses coding to create art, solve problems and make games. Zoe likes coding because it's creative. "Coding is really fun," she said. "You can show what you think in what you make."

    How does Zoe learn coding? She takes classes at Code. org. The website offers hundreds of free code lessons for kids. In fact, more than 29 million students in 180 countries use it. It hopes to bring coding to even more kids.

    "We believe that every child should have the chance to learn about computers and coding," said Alice Steinglass, the president (负责人) of Code. org. "Computers are part of our world," she said. "It's important for kids to understand how they work."