Mobile phones are very popular with people. They are becoming smaller and more convenient.

Now the scientists in Canada made a smartphone (智能手机）from electronic paper. The PaperPhonc is flexible. People can control it by bending it or writing on it with a pen.

      Though the PaperPhone is only millimeters (毫米）thick, people can do many things with it. For example, people can use it to make phone calls, read books, watch movies and play music. So many people use it as a computer.

The scientists think there will be no paper in the office. And people can store what they want in the PaperPhone.

The scientists from Queen's University in Kingston, Canada said the PaperPhone would be in style in the future. It may be the end of paper and printers.

To make people be interested in this kind of mobile phones, the scientists will make it more beautiful. People will see the PaperPhone on May 10th this year.

    Some of the greatest problems we face today are the destruction (破坏) of our environment. Brown clouds, polluted water, endangered wild animals.., these problems seem so huge.

    So my family does what we can. We take cloth bags to stores instead of using plastic bags. We walk where we don't have to drive...

    But does it do any good? When I am the only one in line at the market with cloth bags, am I doing any good? Does my walking to stores make any real difference to the world?

    I recently learned something about flamingos (火烈鸟) which like to get together in groups of a thousand or more. Every year, when the time comes for migration (迁徙), a few of them first takeoff from the lake. But none of the others seem to notice, so the small group returns. However, the next day they try again. This time few more fly along with them, but most of them still pay no attention, so they return again. They try for several times. Every time a few more birds join in but, since the thousands of others still take no notice, the great migration plan is once more stopped.

    Then one day something changes. The same small group of birds once again starts flying and a small number more join in just as before, then more. Finally, they all take flight and the migration really begins. What a spectacular sight it must be—thousands of flamingos taking off into the sky at once!

    A few can make a difference. Even if you're the one to take the first step, and continue trying, others will someday take notice and together we will solve even our greatest problems.

    North American black bears are shy animals. They are fearful by nature, and will usually run away if they see or hear people. Because of this, it can be difficult for scientists to learn about these animals.

    In order to study black bears, researchers from New Jersey, the US, catch bears and use drugs to help them go to sleep. Researchers then work out the size and the weight of the bears, take blood, to test for diseases, remove a tooth and take it to the lab to find out its age. From these studies, researchers want to find out how many bears live in New Jersey, how long they live, and how many babies they produce.

    But in Minnesota, the US, researchers study bears that are completely awake. The bears know the researchers' voices and they are not afraid of the research team. With the help of a few grapes to keep the bears busy, researchers can touch them to check their hearts, look at their teeth, and do other jobs. Researchers can also walk or sit with bears for hours and make videos to learn about their everyday lives."

    In both places, the main purpose is the same—to make sure there is a healthy population of black bears. But the research methods and the kinds of information that researchers are able to collect are quite different.

    What will the world of the future be like? There are plenty of people who are happy to give their opinion of what we will be doing in 2050. Here are two predictions about the world of tomorrow.

    When we dream about the future, many like to think of owning a personal flying car. The advantages are obvious. This technology would allow total freedom of movement. We could fly at 480 km per hour, avoiding traffic lights and busy roads. However, some people believe there will be problems with traffic control. If the cars become popular, there is likely to be air traffic jam. Another big problem is mechanical failure. What will happen if the cars stop working? These are problems we must expect if flying cars become a reality.

    Three-dimensional printing is another new technology with exciting possibilities. 3D printers are used to build an object with liquid plastic.

    They build the object layer by layer until it is complete. Car companies already use 3D printers to make life-size models of car parts, and medical companies use the technology to make man-made body parts. As we move into the future, 3D printing will revolutionize the way we shop, the way we manufacture and the way we treat sick people. The disadvantage is that such equipment will be extremely expensive.

    So in the future, we might be able to fly to work or print out new shoes. Although there are some problems to solve before this will be possible, we can certainly dream of a world where technology makes life easier and safer for millions of people.

Dear sir,

    I am doing a project(课题) at school about animals in danger. I think the situation all over the world is really terrible.

    Firstly, I feel so sorry for the giant panda. Pandas mainly live on bamboo. A panda can eat about half its body's weight(重量) of bamboo in 24 hours！That's a lot of bamboo. I think we should try to do more to stop cutting down their forests. We would be so sad if they disappear.

    Secondly, what we should try to protect more is the Chinese alligators(短吻鳄) . They live in some parts of eastern China. They live in freshwater rivers and lakes but the water in some places isn't clean enough for them to live in. It's really dirty in fact. The government should stop factories from polluting the lakes and rivers.

    If we protect these beautiful animals in China, more people may come to China to visit our beautiful country, especially to see the quieter areas in the country. Now most visitors just see the cities.

    I hope you will encourage(鼓励) more people to think about such an important subject.

Yours,

Huang Jing