It seems hard to watch someone yawn（打哈欠）and not to yawn ourselves. Even reading about yawning can make you do it. Now, a new study has found why yawning has such a powerful force.

    Yawning when others yawn, the study suggests, is a sign of pity and a form of social connection. Kids don't develop this deeply rooted behavior until around age four, the study found. Kids with autism (自闭症) are less likely to catch yawns. In the most serious cases, they never do. Yawning might help doctors to see whether the children are developing rightly. The work could also lead to a better understanding of the ways that people communicate and connect.

    “Emotional infection seems to be a born thing that connects us together,” said Molly Helt, a graduate student in psychology at the University of Connecticut. “Yawning may be part of that.” Inspiration for her study came when she tried to get her own autistic son to clear his ears on an airplane. She repeatedly yawned at him, hoping he would yawn back. He never did.

    “The fact that autistic kids don't do it might mean they're really missing out on that emotional connection with people around them,” she said. “The biggest thing people try to figure out after birth is how we become humans and understand that humans have minds that are different from others',” she added. “Autistic people never seem to understand that.”

    Like infectious（有感染力的）laughter and crying, scientists have found that yawning is a shared experience that promotes social connection. Helt said it could fight stress after a period of being nervous and spread a feeling of calm through a group.

    Students in many countries are learning English. Some of these students are little children. Others are teenagers. Many are adults. Some learn at school, others learn by themselves. A few learn English over the radio, on TV, or in films. One must work hard to learn another language.

    Why do all these people want to learn English? It's difficult to answer this question. Many boys and girls learn English at school because it is one of their subjects for study. They study their own language, math, English, and so on. Some people learn it because it is useful for their work. Many people learn English for their work and higher studies, because at colleges or universities some of their books are in English. Other people learn English because they want to read newspapers or magazines in English.

    The next generation of artificial intelligence (AI) may be sitting right beneath you, at least if furniture maker Ikea has any say in the matter. The Swedish furniture company's “future-living” research lab in Copenhagen is conducting a survey to understand what people want when it comes to smart furniture.

    AI is now walking into more aspects of people's daily lives. Self-driving cars are just around the corner, and AI robots can play and beat the best players of strategy games. As smart home technologies have become more ubiquitous, products ranging from smart electrical outlets（插座）to smart smoke alarms are flooding the market. Therefore, it's not surprising that Ikea would be moving in the same direction.

    Exactly why people would want their sofa or bed frame to speak to then, track their daily movements or offer help is not yet clear. Though Ikea's the new survey doesn't directly answer that question, it does provide a hint of what people would feel comfortable with. Most participants wanted a more human0like form of virtual（虚拟的）assistants, as opposed to one that is more robotic. In terms of the ideal gender（性别）of the assistants, the most popular choice was neither male nor female. Few wanted a religious form of AI.

    Just as with human friends, most wanted AI friends that were like them, affirming their own worldview. They wanted an AI assistant that was reasonably intelligent-that could collect data to predict what a person wanted before he or she asked, and that could prevent someone from making mistakes.

    This is not the first time that Ikea has set foot in the field or futuristic technologies. In addition to wireless charging tables and chainless bikes that never rust（生锈）, the furniture giant has also pictured smart kitchens that can cook the best meal. To decide on how intelligent you want your next sofa or bookshelf to be, you can take Ikea's survey online.

    There are some people who seem to always be surrounded by friends, and there are others who always seem to be standing on the outside, looking in at the crowds of friends. If you are one of the outsiders, it is time to break out of your shell and start making new friends. {#blank#}1{#/blank#}

    ⒈Be yourself. Nobody likes a phony(虚伪的人). In fact, if you aren't yourself, others won't become friends with you. When the time comes that you feel comfortable enough to act like yourself again, you may not be well received, because you are a totally different person.{#blank#}2{#/blank#}

    ⒉Use technology. {#blank#}3{#/blank#} For instance, Weibo is a great place to meet new people. It creates experiences and you get to meet like-minded people who share your interests.

    ⒊Start with people you know. Reach out and contact new friends, and reconnect with old friends you haven't seen in a long time. Don't forget about friends of friends. You may connect with some really cool people just by hanging out with your friends and their friends. {#blank#}4{#/blank#} If you stay home, you aren't going to meet people.

    ⒋Keep in touch. {#blank#}5{#/blank#} With the Internet and social media, there is absolutely no need to worry about that these days. Look up old friends and contact them.

A. There are all kinds of online groups that you can join.

B. Knowing others well is very important.

C. Therefore, let people get to know the real you.

D. If you are invited to go out, go.

E. All too often, people lose touch with one another.

F. Here are some tips that will help.

G. You need to trust yourself, whatever happens.

    Keeping the memory in shape is important at any age, but it requires a bit more work as we grow. There are some simple activities that can improve your memory.{#blank#}1{#/blank#}

    Awaken your senses.

    Use your senses to help your memory store(储存) needed information. {#blank#}2{#/blank#}You can ask yourself like this: Is the sky a light blue or deep purple? The more involved(参与的) you can be in the information, the easier it is for your brain to store it.

    Use imagination and relation.

    Trying to remember names? Let's say you meet a man named Frank Parker. {#blank#}3{#/blank#}Tie the two together by picturing Frank dressed up in a hot dog costume(服装) parking his car in the parking lot. Now each time you see Frank, you should easily recall his name.

    Breathe deeply and relax.

    {#blank#}4{#/blank#}Relax, breathe deeply and slowly and let your mind ease up for a minute. Being relaxed makes it easier for information to be both stored and remembered.

    {#blank#}5{#/blank#}

    When you come upon something you need to remember, say to yourself, “Hey, pay attention and remember this!” You are giving yourself a wake-up call as well as giving your mind a marker that it can use to help in storing the new information.

A. Give yourself an order.

B. Get a good night's sleep.

C. Here are four of them to get you started.

D. Picture a hot dog for Frank and a car for Parker.

E. For example, note the colors of a picture you want to remember.

F. When we try hard to remember something we often become nervous.

G. The way you live influences not only your physical health but also your memory.

    Like all big cities, Paris has a traffic problem: lots of cars, lots of traffic jams (阻塞) and lots of pollution from exhaust fumes (废气). So the city began a scheme (计划) to improve the situation.

    Under the Velib scheme ('Velib' comes from vélo liberté, or 'bicycle freedom') people can take a bicycle, use it for as long as they want, and then leave it at the same or another bicycle station. The first half-hour on the bike is free, but if you don't return it after 30 minutes, you have to pay. But it's only €1 a day or €29 a year! The bicycles are heavy (25 kg), and they are all grey and have baskets. There are about 20,000 of them in the city, and around 1,450 bicycle stations. So there are a lot more Velib stations than the 298 subway stations!

    Paris is not the first city to have a scheme like this. But not everybody thinks it's a great idea. One Parisian said, 'These bicycles are only for short journeys. If people want to travel across the city, they won't use a bicycle—they'll still use their cars.'

    A city spokesman said, "The bicycle scheme won't solve all our traffic problems, of course. But it might help reduce air pollution. Traffic, together with factory fumes, is a big problem. There aren't any simple answers to traffic problems and pollution in cities. But unless we do something now, there will be more traffic jams and temperatures will continue to rise, so the problems in our environment will get worse. The bikes might help people to lead a healthier life, too."