They may be teenagers, but 17-year-old Brittany Bull and 16-year-old Sesam Mngqengqiswa have grand ambitions(雄心) — to launch Africa's first private satellite (卫星) into space. They are part of a team of high school girls from Cape Town, South Africa, who have designed and built equipment for a satellite that will orbit over the earth's poles scanning Africa's surface.

    Once in space, the satellite will collect information on agriculture, and food security within the continent. Using the data/we can try to determine and predict (预测) the problems Africa will be facing in the future”, explains Bull, a student at Pelican Park High School.“Where our food is growing, where we can plant more trees and vegetation and also how we can monitor remote areas,” she says. “We have a lot of forest fires and floods but we don't always get out there in time.'' Information received twice a day will go towards disaster prevention.

    It's part of a project by South Africa's Meta Economic Development Organization (MEDO) working with Morehead State University in the US.

The girls (14 in total) are being trained by satellite engineers from Cape Peninsula University of Technology, in an effort to encourage more African women into STEM (science, technology, engineering, mathematics).

    Scheduled to launch in May 2017, if successful, it will make MEDO the first private company in Africa to build a satellite and send it into orbit.

    Mngqengqiswa comes from a single parent household. Her mother is a domestic worker. By becoming a space engineer or astronaut, the teenager hopes to make her mother proud. “Discovering space and seeing the Earth's atmosphere, it's not something many black Africans have been able to do, or get the opportunity to look at I want to see and experience these things for myself,” says Mngqengqiswa.

    Her team mate Bull agrees, “I want to show to fellow girls that we don't need to sit around or limit ourselves. Any career is possible-even aerospace.”

    Winter is a really fun time of the year—it's great to have snowball fights and build snowmen.{#blank#}1{#/blank#}When it's cold outside and you're not prepared, you can feel uncomfortable. Lucky for you, learning how to stay safe is not difficult.

    {#blank#}2{#/blank#}Wearing thick clothes is the best way to stay warm in the cold. Depending on where you live and how cold it is, some kids may need more clothes, some less.

    Take that hat. You maybe wear a large overcoat and ready to go, but are you forgetting something?{#blank#}3{#/blank#}You'll stay much warmer with a hat than without one—tons of body heat escapes right from your head.

    Drink up. Sounds like advice for hot weather, not cold weather, right?{#blank#}4{#/blank#}When you're outside in the cold and breathing hard, your body loses a lot of water through your breath. And the best way to get that water back is to drink up!

    Take it easy. Sometimes if you're out having fun, it's easy to forget to pay attention to your body. But if your body temperature drops even 4 or 5 degrees while you're outside, it can make you feel terrible.{#blank#}5{#/blank#}And if you ever feel weak, those are signs that you have to take it easy indoors for a while.

A. Love those clothes.

B. Have a snowball fight.

C. Pull a hat onto your head.

D. That's why you need to be careful with your body's signals.

E. Well, the truth is that it's good advice for both kinds of weather.

F. But you have to know how to be safe while you're out having fun.

G. You can stay outside as long as possible to fully enjoy your snow days.

    At your next meeting, wait for a pause in conversation and try to measure how long it lasts.

    Among English speakers, chances are that it will be a second or two at most. But while this pattern may be universal, our awareness of silence differs dramatically across cultures. What one culture considers a confusing or awkward pause may be seen by others as valuable moment of reflection and a sign of respect for what the last speaker has said. Research in Dutch (荷兰语) and also in English found that when silence in conversation stretches to four seconds, people start to feel uneasy. In contrast, a separate study of business meetings found that Japanese people are happy with silence of 8.2 seconds—nearly twice as long as in American meetings.

    In Japan, it is recognized that the best communication is when you don't speak at all. It's already a failure to understand each other by speaking because you're repairing that failure by using words.

    In the U．S., it may originate from the history of colonial (殖民地的) America as a crossroads of many different races. When you have a couple of difference, it's hard to establish common understanding unless you talk and there's understandably a kind of anxiety unless people are verbally engaged to establish a common life. This applies also to some extent to London.

    In contrast, when there's more homogeneity, perhaps it's easier for some kinds of silence to appear. For example, among your closest friends and family it's easier to sit in silence than with people you're less well acquainted with.

    Pangolins (穿山甲) are strange-looking creatures, covered with hard scales (鳞). They can roll up into a ball to protect themselves from enemies and have tongues that are longer than their bodies.

    Pangolins have recently become the focus of Chinese people. A screenshot (截屏) of a micro blog post showing some people eating pangolins at a feast spread. A few days later, people were angered again by pictures showing people eating protected animals, including pangolins.

    Yet this is only the tip of the iceberg. Many more pangolins have been hunted or killed. According to the International Union for Conservation of Nature (IUCN), more than 1 million of them have been killed or sold in the last 10 years. It also said that they are the most illegally traded mammals in the world. In September 2016, the IUCN added the pangolin to the world's "endangered animals list". They are now more endangered than pandas.

    A growing trade of their scales and meat is the main reason for their decline in numbers. Many people in Asia and Africa consider pangolin meat is delicious. Some people even think pangolin scales have medical qualities. However, their scales are made of keratin (角蛋白), the same material human fingernails are made of.

    Luckily, the situation is getting better. World Pangolin Day is on the third Saturday of February each year. It's a day to help people know more about pangolins. The government now stops anyone from buying and eating pangolins in China. Breaking this law is regarded as a crime. The trade of pangolins across the world is also not allowed, according to the Convention on Trade in Endangered Species of Wild Fauna and Flora.

    My house is made of wood, glass and stone. It is also made of software.

    If you come to visit, you'll probably be surprised when you come in. Someone will give you an electronic PIN (个人身份证号码) to wear. This PIN tells the house who and where you are. The house uses this information to give you what you need. When it's dark outside, the PIN turns on the lights nearest you, and then turns them off as you walk away from them. Music moves with you too. If the house knows your favorite music, it plays it. The music seems to be everywhere, but in fact other people in the house hear different music or no music. If you get a telephone call, only the nearest telephone rings.

    Of course, you are also able to tell the house if you want something. There is a home control console (控制台), a small machine that turns things on and off around you.

    The PIN and the console are new ideas, but they are in fact like many things we have today. If you want to go to a movie, you need a ticket. If I give you my car keys, you can use my car. The car works for you because you have the keys. My house works for you because you wear the PIN or hold the console.

    I believe that ten years from now on, most new homes will have the systems that I've put in my house. The systems will probably be even bigger and better than the ones I've put in today.

    I like to try new ideas. I know that some of my ideas will work better than others. But I hope that one day I will stop thinking of these systems as new, and ask myself instead, "How did I live without them?"

    Education has always been a hot topic. How to educate children can be a sweet but painstaking task for parents, many of whom try to offer their children the best environment. Competition between parents over children's education may start from the kind of animated (动画) series children watch. {#blank#}1{#/blank#} By watching the former, children can learn English at the same time. However, this does not mean those watching foreign shows perform better than those watching Chinese ones. {#blank#}2{#/blank#} They can help children learn traditional Chinese culture and history. Take Journey to the West for example. {#blank#}3{#/blank#}

    By watching this show, children can learn more about the history of the Tang Dynasty and the development of Buddhist culture in China. Foreign shows can open a window for children to gain a better understanding of the outside world. So, children ought to be encouraged to watch both as long as the content of the show is beneficial.

    This can also be applied to other things beyond animated series. {#blank#}4{#/blank#} However, some parents fail to do this. Their incorrect view can more or less leave an influence on their children. Innocent (天真的) children, influenced by their parents, slowly hold the view that watching foreign shows is better than watching Chinese shows. {#blank#}5{#/blank#}

A. Chinese shows have their own advantages.

B. Foreign animated series are always the first choice for parents.

C. Children often follow their parents' advice when choosing animated series.

D. For example, children can be encouraged to read folk tales at home and abroad.

E. Once the view is formed in children's minds, parents' education proves a failure.

F. This show is based on one of the four great classical novels of Chinese literature.

G. For some parents, watching foreign animated shows is better than watching Chinese ones.