The days of having to carry a phone charger(充电器) everywhere could soon be over. Researchers from America have made great progress in getting energy from human motion(运动). They say smartphones could get enough power just by the motion of fingers on the screen.

    The low-cost device(装置) has already been tested in an American university. Scientists successfully showed an LED touch screen, a total of 20 LED lights and a keyboard, all with a simple touching or pressing motion and without the help of a battery.

    "What I predicted is the possibility of not having to charge your smartphone for a whole week, for example, because that energy will be produced by your motion," said one of the researchers.

    The completed device is as thin as a piece of paper. Electrical energy is created when you press it. The device used to power the LED lights is the size of a hand while the device used to power the touch screen is as small as a finger.

    The device will become more powerful when folded. Each time you fold it, the energy you create will be doubled. You can start with a large device, but when you fold it once, and again, and again. It's now much smaller, but it has more energy. It may be small enough to put in a specially made heel(脚后跟) of your shoe so it can create power each time your heel knocks the ground. The researchers are also developing technology that would send the power produced from the heel strike to an earphone.

    We all know that many women like to wear dresses. They enjoy many kinds of colourful and popular dresses. But have you ever heard of a 4D dress?

    Jessica Rosenkrantz in the USA used 3D printing technology to make a very special and new dress. It will help with the problems of different styles for women's dresses.

    The dress maker called the special dress a "4D dress". It is like the fabric(织物). It can turn into different kinds of shapes.

    The company, in Massachusetts, the USA, also made a smartphone and an app(应用软件). They can help women to control their dresses. If women use the phone and the app, they can change the colour, the style and many other things of the dresses. Isn't it very interesting?

    When she talked about her work, Jessica said, "There will be many more changeable dresses for women in the future. I am interested in making them too. I can't wait to make different kinds of new dresses for women."

We all know that paper-making, gunpowder, the compass and the art of {#blank#}1{#/blank#} (print) are the Four Great Inventions of ancient China. But have you heard of another important invention—the abacus (算盘)?

It's said that Li Shou (隶首) invented the abacus. It {#blank#}2{#/blank#} (be) around for over 5, 000 years. Some researchers believe the abacus has a {#blank#}3{#/blank#} (long) history than the other calculators (计算器) in the world. In China, people {#blank#}4{#/blank#} (use) abacuses to do calculations for thousands of years before people use electronic calculators in daily lives. 

The abacus is usually made of wood. It has many beads (珠子). Each bead above the abacus stands for five, and each bead below stands for one. {#blank#}5{#/blank#} moving the beads up or down, one can do all kinds of calculations. 

It is pleasant thing to watch a skilled hand use an abacus. Fingers move, beads knock, and after {#blank#}6{#/blank#} few seconds, the result comes out. In the past, the use of the abacus was a necessary skill. {#blank#}7{#/blank#} it was taught in many schools. 

Today, because we have been used to {#blank#}8{#/blank#} (use) electronic calculators, we don't have many chances to see an abacus in our daily lives. Many young people have not even {#blank#}9{#/blank#} (hear) of the word "abacus". However, the abacus still plays an important role in certain situations. 

The abacus is one of the important inventions in Chinese history. It used to make a big difference to Chinese people's life. It is one of the {#blank#}10{#/blank#} (reason) why we are proud of China. It shows the great wisdom of the ancient Chinese people. It is our national treasure.

These days, many young people always say, "I feel a bit ‘emo'." The word means "emotional". It means someone has strong feelings. {#blank#}1{#/blank#}

Everyone has bad feelings from time to time. You may feel unhappy when you get a low score in an exam. {#blank#}2{#/blank#} The emotions build up and then explode (爆发) at some point. They make you shout and cry. You may not want to eat, speak, or play. {#blank#}3{#/blank#}

Let the good feelings fight the bad ones! {#blank#}4{#/blank#} The Dementors (摄魂怪) in the films make people feel sad and scared. But there is one way to beat them—eating some chocolate and trying to think of the happy time. In real life, you should also always look on the bright side of things. For example, getting a low score in an exam is not always bad. {#blank#}5{#/blank#} And next time you can do better. So take it easy. Don't forget that you're the master of your emotions.

Here's a famous doctor's advice. 

●To keep fit, you need to have right food for each meal. Start the day by drinking a glass of water or orange juice. It's not good to have coffee or tea with an empty (空的) stomach. You should know that water is the best drink. 

●For lunch, you'd better not have junk food like hamburgers or French fries. Fish and green vegetables are really right for lunch. They can give you all kinds of nutrients (营养) . 

●If you still feel hungry in the afternoon, eat some fruit or have some nuts (坚果) —they're good for your health. Don't eat too much sweet food such as ice cream and chocolate. It's not good for your teeth. 

●For dinner, have some bread and soup (汤) . Fresh vegetables are also suggested. 

①People need friends. People make friends at school or at work. People also make friends in their neighborhood.

②What do people do with their friends? People can spend time together with their friends. They talk with friends and share their ideas. This makes people know more about their friends. People make things with friends and learn from one another. They go to the movies with their friends too. What's more, people play games and cards with their friends. Friends are often helpful.

③There are some kinds of special friends in people's lives.

④Internet(互联网) friends are one of them. Do you like making friends on the Internet? It is popular today. That's because more and more people think it is an easy way to make friends. Another kind of special friends is penfriends. Making penfriends is a good way to know people in different places of the world.

⑤Friends are special and important people in our lives. We can live a happy life with friends.