Many people are surprised when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network broke down, then the whole network stopped. So a few network system had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent through another part. In this way computer network system would keep on working all the time.

At first the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed to use it, too. However, computers were still very expensive and the Internet was difficult to use. By the start of 1990s, computers became cheaper and easier to use. Scientists had also developed software that made "surfing" the Internet easier.

    Today it is easy to get online and it is said that millions of people use the Internet every day. Sending e-mails is more and more popular among young people. The Internet has now become one of the most important parts of people's life.

    Tablets are really useful devices, but their big screens always make them as a burden to carry around without a bag. Wouldn't it be great if there were a phone with the powers of a tablet that could be folded up and fit into the hand?

Now something like a tablet-shaped but foldable phone is about to become available. In February, South Korean electronics company Samsung and China's Huawei both showed foldable phones, The Galaxy Fold and Huawei Mate X respectively. Mobile phone use has entered the "foldable future", The Verge noted.

    The technology could change our lives in unusual ways. These devices, due to their foldable screens, give us the larger screens we want. At the same time, they still fit easily into the pocket. As USA Today noted, they're "the combination of a small tablet and smartphone, all in a single device".

    The technology could change other devices too. For example, we could make TVs that stick to walls like posters, or fold up easily to hide away in drawers. In crowded modern cities, they will help us to make full use of available space.

    In a keynote speech, Samsung's senior vice president of mobile product marketing, Justin Denison, called the foldable screen "the foundation for the smartphone of tomorrow". "It's a piece of white paper for us to paint something beautiful on together," he said.

    So is there nothing to stand in the way of the foldable future?

According to technology news website Android Authority, the necessary displays* were difficult to produce. At present, these foldable devices cost too much. For example, the price of Huawei Mate X is 17,500 RMB. That's a price that few people will be able to afford.

    But if the foldable device isn't going to change the world overnight, there is no doubt that it is coming.

    Patrick Moorhead, an industry expert told The Verge, "Few are debating if foldable mobile displays are the future of smartphones; the only question is when and by whom."

    Every day in all kinds of weather, many thousands of men and women like jogging. Why has jogging slowly for long distance become so1? Because jogging makes the heart stronger and helps people2 weight. It can also help them feel3 about themselves.

    Donald Robbins is a forty-two office worker, weighing about over 150 kg. He began jogging a few years ago because he felt he was too4. At first he could only5 about 100 yards. Two years later, he ran in a marathon race over twenty-six miles. Many joggers, like Donald Robbins, feel that if they can succeed in jogging, they can also succeed in6 things.

    Should you jog too? If you do, be sure to ask your doctor for7 Jogging may be too much exercise for you. Does jogging cost much? No, it actually costs almost8 But it is very important to have a good pair of shoes that were made especially for jogging.

    How fast should you go? Jog with a friend and talk to each other as you run. If you have difficulty in9 you are going too fast.

    How far should you go? Remember not to go too far or too soon. In fact, you should walk and do not run for the first few times. Then do some short jogs, but no more than "hat you can do10. After that, increase your distance a quarter or half mile every two weeks or so.

Nowadays more and more people prefer to go fishing or hiking in the woods. Experiencing nature is {#blank#}1{#/blank#}, but when you're doing this, always keep yourself safe. It's important to remember several basic rules if you don't want to turn a pleasant outing into a {#blank#}2{#/blank#}.

First, be fully prepared for different weather. Before you set out, always get warm clothes and raincoats ready, just in case! This is especially true in the {#blank#}3{#/blank#} of travelling in the mountain areas. The weather is really {#blank#}4{#/blank#} in high mountains. Sometimes you can experience two or three seasons in one day.

Second, {#blank#}5{#/blank#} a map, a compass, and a flashlight in your bag. Even experienced travelers get lost. Before you start your trip, study the map to get familiar with the area you are going to. The flashlight is important if you do get lost. Many trips that start out in daylight will {#blank#}6{#/blank#} become nighttime adventures when people can't find their way.

Third, bring a first-aid kit and know how to use it. Small cuts can be more serious when there is no doctor {#blank#}7{#/blank#}.

Finally, tell people where you are going and when you plan to come back. That way, someone will go search for you if troubles {#blank#}8{#/blank#}. This will increase your chance of being found quickly.