When Russell Lyons volunteered for the first time, he read “Goodnight Moon” to a class of San Diego preschoolers. And it wasn't reading — he'd memorized the book and was reciting it out loud. He was 4. Still, he said it felt good there, in front of the other kids, lending a hand. He wanted more of that feeling.

    Thirteen years later, he's getting a lot of it. He's on a five-month road trip across America — not sightseeing, but volunteering.

    The University City resident has spent time at an animal reserve in Utah, a women's shelter in St. Louis, a soup kitchen in New York, a retirement home in Tucson. This week he's in Los Angeles, at a program that supports disabled youth.

    “I just like helping people and feeling that something I do is making a difference,” he said. He resists the idea that his “Do Good Adventure” is all that unusual. It bothers him that the media often describe young people as lazy, self-centered. So he sees his trip as a chance to make a statement, too. “About 55 percent of teens do volunteer work, higher than the rate for adults” he said, according to a 2002 study. “Not everybody knows that. ”

    Of course, some teens do volunteer work because it looks impressive on their college applications. Lyons said he mentioned his trip on his applications. But charity work is a habit with him. Even before the cross country trip, he was volunteering about 200 hours a year at various places. He's made sandwiches for homeless families in Washington D.C. He's taught math to fifth-graders in Cuernavaca, Mexico.

    He gets some of that drive from his mother, Lesley Lyons, who has been involved in nonprofits for much of her life. She was there when her son “read” to the preschoolers — a memory of hers “that will never go away.”

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。

    2018 Music Festivals, UK

    The Green Gathering

Date:15th Aug. —22nd Aug

    Location: Chepstow Center

    Details: Over 100 live bands plus DJs on five private solar-powered stages. A wonderful site in a wooded area of outstanding natural beauty. 8 days of inspiration and relaxation are about traditional crafts, campaign stalls(活动摊位), and a magical kids' area.

    Sport Beat Music Festival

Date: 20th Aug. —29th Aug

    Location: Oxstalls Sports Park

    Details: Time for fun in the sun with Sport Beat. The festival is for those who wish there are volleyball and netball games that take place over the weekend. Attractions include: ball coaching, food village, and bars. Please see details for VIP passes on our website.

    Creamfields Festival

    Date: 26th Aug——28th Aug

    Location: Daresbury Court

    Details: Creamfields is the world's leading dance music festival. Creamfields is famous for many things, not just its traditional world class dancing but its unbeatable atmosphere! The festival mixes together style breaking pioneers from across the DJ and live music spectrum(声谱).

    Wilkestock Charity(慈善)Music Festival

    Date:27th Aug—31st Aug

    Location: Wilkestock Stadium

    Details: With entertainment this year from mystery jets to a huge electronic lineup(陈容), this festival keeps turning up the heat year on year while keeping all profits donated direct to charity.

    Does stress cause gray hair? Many people believe that tension and stress can cause your hair to lose its color. In fact, it is an old-wives' tale that being upset all the time can result in premature graying. Here is a closer look at this situation and why some believe that this old wives' tale could be true.

    As one ages, the hairs on the head also age. In fact, just about everything on the human body begins to show signs of wear and tear (磨损) after a while. The joints wear and become stiff and skin wears and becomes wrinkled. Hairs on the head grow and eventually die. They are replaced, but in the process something else happens.

    When new hairs are replacing the old ones, the color or pigment (色素) is also added to them. However, as one ages, this pigment becomes less and less available. At first, hairs will have a limited amount of pigment and they will appear to be grayish in color. In time, they will lose all of their pigment and will be white. Many things are known to cause graying, and genetics is a very powerful factor. If one of your parents turns gray at an early age, there is a good chance that you will too. Some people begin the graying process in high school, while others may be over the age of forty.

    Constant worry and tension can have many harmful effects on the human body. It is a known fact that stressful times can cause one to suffer hair loss. It would make sense that if it can cause these problems, perhaps it also may contribute to graying. However, there is no sound evidence to support this.

    On the other hand, many medical professionals believe that there may be a link between graying and a constant state of anxiety or tension. Does stress cause gray hair? There is no scientific evidence to support the theory, but it is best to avoid stressful situations.

    It's interesting when you think about how Japan is a nation that appreciates the virtues of silence and good manners, and yet when it comes to eating noodles, Japanese people can be the loudest in the world.

    According to lifestyle website grapee.jp, slurping when eating noodles is encouraged in Japanese culture. It's believed that taking air into your mouth can enhance the flavor of the noodles, and that it helps cool down the noodles. It's also considered to be a way to show appreciation for the dish. Sometimes, just making the noise alone seems to make the noodles more enjoyable.

    It wasn't until a new expression - “noodle harassment”,or “hu-hara” in Japanese - came out last year on social media that Japanese people started to realize that the slurping noise is making some foreign visitors uncomfortable.

    As a response, Japanese instant noodle maker Nissin introduced a so-called noise-canceling fork earlier this year. The fork, which looks like an electric toothbrush, is connected wirelessly to a smartphone. When the person using the fork starts to slurp, the fork sends a signal to the person's phone, making it play a sound to mask the slurping noise.

    “The fork is a solution to the 'noodle harassment' issue, particularly as the number of tourists visiting Japan increases,” said the company, according to Euro News.

    But is it really necessary?

    Dining traditions do vary. What's considered to be proper table manners in one country is likely to be seen as rude in another. In India, for example, people eat with their hands because they think in this way they build a connection with the food. However, people who are used to eating with utensils（餐具）might find it uncomfortable to get their hands covered with oil and bits of food. But this eating method is part of India's culture, just like Japan's slurping is part of its own.

    “So, if you are eating noodles, whether that's ramen（拉面）, udon（乌冬面）, or soba（荞麦面）, please slurp,” wrote the reporter Brian Ashcraft on blog Kotaku. “If anyone gets annoyed while you are doing that, pay them no mind because they're missing the point entirely.”

China is a land of bicycles. At least it was back in 1992 when I traveled the country. Back then everyone seemed to be riding a bicycle. Millions of them, all black. Cars were rare. Yet since my arrival in Beijing last year, I've found the opposite is true. There are millions of cars. However, people still use their bicycles to get around. For many, it's the easiest and cheapest way to travel today. Bicycles also come in different colors—silver, green, red, blue, yellow, whatever you want.

    It's fun watching people biking. They rush quickly through crossroads, move skillfully through traffic, and ride even on sidewalks(人行道). Bicycles allow people the freedom to move about that cars just can't provide.

    Eager to be part of this aspect of Chinese culture, I decided to buy a bicycle. Great weather accompanied (伴随) my great buy. I immediately jumped up on my bicycle seat and started home.

    My first ride home was orderly(守秩序的). To be safe, I stayed with a large group of bikers while cars on the streets came running swiftly out of nowhere at times. I didn't want to get hit. So I took the ride carefully.

    Crossing the streets was the biggest problem. It was a lot like crossing a major highway back in the United States. The streets here were wide, so crossing took time, skill and a little bit of luck.

    I finally made it home. The feeling on the bicycle was amazing. The air hitting my face and going through my hair was wonderful. I was sitting on top of the world as I passed by places and people. Biking made me feel alive.

    Next month, I'm traveling to a remote area of Central Africa and my aim is to know enough Lingala — one of the local languages — to have a conversation. I wasn't sure how I was going to manage this — until I discovered a way to learn all the vocabulary I'm going to need. Thanks to Memrise, the application I'm using. It feels just like a game.

    "People often stop learning things because they feel they're not making progress or because it all feels like too much hard work," says Ed Cooke, one of the people who created Memrise. "We're trying to create a form of learning experience that is fun and is something you'd want to do instead of watching TV."

    Memrise gives you a few new words to learn and these are "seeds" which you plant in your "greenhouse". When you learn the words, you "water your plants". When the application believes that you've really memorized a word, it moves the word to your "garden". And if you forget to log on, the application sends you emails, reminding you to "water your plants".

    The application uses two principles about learning. The first is that people memorize things better when they link them to a picture in their mind. Memrise translates words into your own language, but it also encourages you to use "mems". For example, I memorized motele, the Lingala word for "engine", using a mem I created — I imagined an old engine in a motel (汽车旅馆) room.

    The second principle is that we need to stop after studying words and then repeat them again later, leaving time between study sessions. Memrise helps you with this, because it's the kind of application you only use for five or ten minutes a day.

    I've learnt hundreds of Lingala words with Memrise. I know this won't make me a fluent speaker, but I hope I'll be able to do more than just smile when I meet people in Congo. Now, I need to go and water my Vocabulary!