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    William Lindesay, a British traveler and writer, has been exploring the Great Wall—one of the human's most wonderful building projects. Not even a Chinese knows the Great Wall of China as well as he does.

    When, as a schoolboy, Lindesay announced his plan to explore the Great Wall, nobody took him seriously. But Lindesay achieved his goal, by spending 25 years on the Great Wall and has become one of the world's most famous experts on its rich history. Lindesay now lives and works in Beijing. This year his new book has come out, The Great Wall Explained, with a lot of photographs and articles.

    Running on the Great Wall was a brave trip and Lindesay had already run 3,000 kilometers along it! During those years, he got to many villages along the way. He was often helped by friendly villagers, although they didn't quite understand why the Englishman would have such interest in the Great Wall.

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    Mike's eleventh birthday is next Saturday. He wants to have a dinner party at his house. He asks some good friends to his party. David and Sally are two of them. Now they are discussing (讨论)what they will buy for Mike.

    David: Hey, Mike's birthday dinner is next Saturday. Let's thin k about the food.

    Sally: Sure, does he like birthday cake?

    David: No, he doesn't. He is tired of(对……厌烦)butter(奶油)a lot.

    Sally: Well, what does he like?

    David: He likes burgers and fried chicken．

    Sally: That's great. I like them too. What about vegetable salad?

    David: No, he doesn't like. But he likes fruits.

    Sally: What fruits?

    David: I think his favorite fruits are apples and bananas.

    Sally: OK. Oh, don't forget ice-cream. He likes it too.

    Sally: All right. Let's take all.

    Members of an international organization are called the Global Greeters. They offer travelers the chance to get to know a city as well as local people do.

    Unlike the professional guides(专业导游), the volunteer greeters act more like neighbours. They take visitors to visit the city–either on foot or public traffic—to discover favourite neighbourhoods, cafes and parks.

    All the programs work a little differently, but the basics(基本项目) are the same. The tours are free and last anywhere for two or four hours. Volunteers can be all ages, and their ages and interests try to match the travelers.

    New York City(USA)

    Big Apple Greeter is the pioneer “welcome visitor” program founded in 1992 by New Yorker Lynn Brooks. More than 300 volunteers now can welcome guests from all over the world in 22 languages. Greeters explain the New York City subway and bus systems and show guests around one or more of their favourite neighbourhoods. Like many greeter organizations, Big Apple accepts online donations to help with its daily costs.

    Houston(USA)

    Houston Greeters will organize activities such as golf, biking or an outing to an Astros game(太空人队的比赛). Another activity is to arrange a tour in need of a particular interest.

    Chicago(USA)

    Chicago Greeters help visitors visit one of the city's many famous neighbourhoods. The group organizes walks through Ukrainian Village on the Near North Side and Andersonville, home to Scandinavian restaurants and shops and Middle Eastern bakeries. Guides will also organize tours around themes such as fashion, film or public art.

    France

    In France, English speaking volunteers for Parisien d'un Jour lead visitors through hidden corners of Paris, often ending with a lively discussion on a café balcony. Guides in Lyon organize walks around themes such as shopping, markets and sports.

    It was Mother's Day. John was so busy with his work that he couldn't go back home. When he passed by a flower shop in the evening, an idea came to his mind. "I'll send Mum some roses."While John was picking his flowers, a young man went inside. "How many roses can I get for only five dollars, Madam?" he asked. The assistant was trying to tell him roses were as expensive as forty dollars a dozen (一打). Maybe he would be happy with carnations (康乃馨).

    "No, I have to have red roses." He said, "My mum was badly ill last year and I didn't get to spend much time with her. Now I want to get something special, it has to be roses as rose is her favorite."

After hearing it, John said he would pay the rest of the money for the young man. Moved by both of them, the assistant said," Well, lovely young men, thirty dollars a dozen, only for you." Taking the roses, the young man almost jumped into the air and ran out of the shop. It was well worth twenty-five dollars John paid to see the exciting moment. Then John paid for his dozen of roses and told the assistant to send them to his mother.

    As he walked out, he felt nice. Suddenly he saw the young man crossing the street and going into a park. But soon he realized it was not a park but a cemetery (墓地). Crying, the young man carefully laid the roses," Mum, oh, Mum, why didn't I tell you how much I loved you? God, please help me find my mum and tell her I love her."

    Seeing this, John turned and quickly walked to the shop. He would take the flowers home himself.

    The Beijing International Horticultural Exhibition（世界园艺博览会）,which is running from

    April 29 to Oct 7, will be attended by 110 countries and international organizations. It has 41 outdoor exhibition centers that will host about 2,500 activities. It is expected to draw around 16 million visitors from home and abroad.

    The theme of the expo is "Live Green, Live Better", aiming to introduce the world to a green, innovative（创新的）and harmonious（和谐的）China. Flowers and herbs from all over the world will be displayed at the expo.

    In addition, wildflowers will also be a highlight at the expo.

    Teeth are a very important part of our bodies. Good teeth help you eat things like apples. They also help you talk. The healthier your teeth are, the happier you will be.

    You can take care of your teeth by brushing and flossing（用牙线清理）them.

    But before that, you have to pick a good toothbrush. Be sure your toothbrush are soft enough Also, brushes with small heads are better. They can reach every corner of your mouth.

    Now it's time to brush. Brushing helps break down plaque（牙菌斑）Plaque is a kind of bad thing that can make small holes in your teeth. Brush your gums at a 45—degree angle（角度）This works well to clean both the teeth and gums.

    Learn how to floss your teeth. It gets rid of food in the spaces between your teeth. Your toothbrush can't get there. Move floss between each tooth gently back and forth once a day. It may feel a little difficult at first, but pretty soon. You'll be good at it!