Each summer, you hear news that some sports players are sent to hospitals because it is too hot. Our bodies can't be outside in the sun for a long time. So in hot summers, be careful about playing sports outside.

    Firstly, to play sports safely in hot weather, you must drink water. Sports drinks are great for athletes, but they have so much sugar that they'll dehydrate（使脱水）you more. However, drinking afew bottles of sports drinks will be good for you.

    Secondly, be sure to take enough breaks to let your body rest. If your coach doesn't let you do so in the heat, don't wait until you feel uncomfortable. Just be honest with your coach when you need breaks.

    Thirdly, when you have a break, don't sit in the sun. With the sun beating down on you, you'll only heat up and sweat（冒汗）more. Take a seat under a tree, or even better, go indoors for a little while.

    Cooling yourself down can help you stay active longer.

    Fourthly, remember that the earlier in the day you start your exercise, the cooler it will be. If you can start practice before the sun comes up, you have a few good hours to practice in the cool hours of the morning. Also, the earlier you practice, the earlier you can finish the exercise. If you need more practice time, come back to the field later in the evening when the sun is setting.

Last but not least, you should watch your food. Eat food which is high in water, starch（淀粉）and carbohydrate(糖类), but be sure to get a good balance in your diet.

    As long as you pay attention to the above, playing sports safely in the heat isn't a difficult thing.

    A bookstore chain(连锁书店), “Popular Bookmall(大众书局)” introduced their unique style of book distribution(分布) in Shanghai back in November. This experimental store offers books at very low prices, and there is no staff(职员) to require shoppers to pay before taking books away. Sounds like a book lover's paradise(天堂)！

    Popular Bookmall had already set up such a shop in Nanjing. The organizers of the Nanjing store report that it was a great success, enough shoppers voluntarily paid for their books. But most older “honesty stores” in China did not receive enough honest shoppers. For example, a shelf-service restaurant opened in Fujian province years ago which allowed shoppers to pay whatever they chose, but about one –fifth of shoppers paid nothing. Therefore some people have speculated(推断) that Chinese are becoming more honest. The organizers of the “honesty stores” say that their goal is to encourage people in China to remember how important honesty is.

    Many are cared about dishonesty in China. Even at Popular Bookmall, not everybody choose to pay for their books. How can we encourage ourselves to be honest? We should listen to our conscience(道德心). This has deep roots in Chinese culture. Confucius(孔子) taught Chinese to be conscientious and honest.

    But there is also a great rational(合理的) reason for “honesty stores”: the more honest people there are in society, the more reasons we have to trust others. And if people trusted each other, they'd be more willing to share. We could contribute to a “sharing economy” where you do not have to think about saving or spending money all the time, but helping other people. For all these reasons, society is built on trust, not only trade.

阅读以上信息，用恰当的单词完成下面的句子，每空一词。

    My name is John. I'm twelve years old. I have many friends. {#blank#}1{#/blank#} Some are older than me and some are younger.

    My best friend is Jim. He's also twelve years old. He comes from the countryside. We are in the same class. {#blank#}2{#/blank#} Jim is good at science and he often helps me with my science. I often help him with his Chinese. He is poor in Chinese, because he never studied Chinese before.

    Jim is 1.70 meters tall. He is taller than me. {#blank#}3{#/blank#} We both have brown hair, but Jim's hair is longer than mine.

    Jim is a little thin, but I am heavy. I don't like sports, so I don't get much exercise. But Jim likes sports very much. {#blank#}4{#/blank#} 

    After school, Jim and I play ping-pong for half an hour on the playground. {#blank#}5{#/blank#} We help and learn from each other. We are good friends.

    Jason Queally is one of the fastest men in the world on a bicycle.

Every year, an important human-powered bicycle race is held in Nevada, the USA. The speed of the bike is measured for only 200 meters, but players take more than a kilometer to get their bikes going fast. Jason Queally's fastest speed for the 200-meterrase was 103.5 kilometers an hour.

    At this year's race, Jason failed to reach the finishing line. He was speeding along about seventy kilometers an hour when he began to lose control of his bike. When he tried to slow down, it began to smoke. Soon the inside of his bike was filled with smoke. He couldn't see, and he couldn't breathe. At seventy kilometers an hour, a crash could be very serious. Jason was frightened, but he managed to stop the bike safely. He would repair his bicycle and try again another time to be the world's fastest man on a bike. Better luck next time, Jason.

    On May 5^th, 2017, at Shanghai Pudong International Airport, China's first Homemade jet airliner(喷气式客机), the C919, took off successfully for the first time. It has taken about ten years for the scientists and researchers to make this Chinese dream come true. It's a pride of the whole nation. So far, more than 23 countries have already ordered 570 C919 planes from China. But we still have a long way to go before the C919 carries passengers by 2020.

    What's more, China is working on the new high-speed trains with the highest speed of 400km/h. It will be ready by 2020. Many countries, especially the ones in Central Asia, Southeast Asia, the Middle East and Eastern Europe, are planning to build high-speed rail lines or to improve their railways with the help of China.

    China has made great progress in both science and technology. And it makes a great contribution(贡献)to humans，too. All of these are changing the daily life of Chinese people，even of the people around the world.

    Typing(打字) is one of the most important and basic work skills of the 21st century. Because mobile phones are now so popular, there is a new kind of typing-thumbing. Thumbing means people use one or more thumbs(拇指) to touch the keys.

    Most people can type between 20 and 35 words a minute. Some typists, however, can work very quickly, at more than 110 words a minute. And people's left hand usually does 56 percent of the typing.

    The most common international English keyboard is QWERTY. People name it after the first letters on the top left side of the keyboard. It is more than 140 years old. Other keyboards include QWERTZ (in Central Europe) and AZERTY (used by most French speakers in Europe). Countries with non-Roman alphabets(字母系统), such as, Arabia, Russia or Japan, have their own keyboards.

    People practise the sentence "The quick brown fox jumps over the lazy dog" to make their typing better. That's because it uses every letter of the English alphabet.

    Thumbing and typing can hurt you. RSI (repetitive strain injury) is the name of a medical condition you get if you type too much. However, most people do not understand what RSI is or how serious it can be. Anyone who uses a computer a lot is at risk and should know about RSI.