It's very for us to do exercise. Doing exercise can not only help us keep fit, but help to train a person's character. What's more, doing exercise helps us to study.We can do exercise  we want. It is good for us to go to school on foot or by bike. In PE classes, we can do all kinds of exercise,  as running, jumping, playing basketball and so on. Let's do exercise and have a healthy lifestyle together!

    Have you seen some machines called "Little Yellow Dog" that eat rubbish and give some

    money to the users? Recently, such machines have at universities in Chongqing. They can turn rubbish into treasure and encourage the public to  used things. The machine is as big as a fridge. If the users put an empty bottle in the machine, it will be identified（识别） by  small camera. Then it will be put into a built-in bin. The users can get some. They can also give it away.

    The machine will tell the company's head office it is filled with bottles. Nearby stations will send workers to have bottles collected. The workers will pack( 打 包 装 )and  them to the company.

    Now the machinenot only plastic bottles but also other resources. These machines couldencourage the public to protect the environment. People can also see machines in Shanghai in the future. There will be more machines at some large stations, bus stops, neighborhoods and schools. But recycling is not enough, experts say. Making waste in the first place is the way forward. Let's work together to make a better world.

    When you are learning English, you find  not clever to put an English sentence, word for word, into your own language. Take the sentence "How do you do?" as an example.

    If you look each word in the dictionary, one at a time, what is your translation? It must be a wrong sentence in your own language.

    Languages do not just have different sounds, they are different in many ways.  important to master the rules for word order in the study of English, too. If the speaker puts  in a wrong order, the listener can't understand the speaker's sentence easily. Sometimes when the order of words in an English sentence is changed, the meaning of the sentence .

Miss Wang recently had a worrying experience.

One morning, just as she arrived at her, Wang noticed some missed calls from her mother. "It must be something very important," she thought to herself.

 Right away, she called her mother  quite worriedly. To her surprise, Wang found her mother only wanted her charger(充电器), which Wang took to the office by mistake.

When Wang hurried home from her office, she found her mother's  was still 70% charged. And her mother was worried that it would run out of power as she continued using it.

Now Wang realizes the seriousness of the problem. Her mother eight hours a day playing games, reading news and watching short videos online. And her mother has problems like poor eyesight, headache and so on.

This story is not special and Wang's mother is not . She is just one in a growing population of the old who lose themselves in playing with phones. As the old have  chances to join in social activities, a smart phone is the best way to kill time.

But too much time on phone can cause many problems. "Be careful when using your phones,  you will be easily fooled:" Although the old are always warned like this, online frauds (欺骗) still happen to them. Now there are more family problems. Action should be taken.

For the old, they should control their screen time and get enough rest. The young, for their part, should often visit the old, and help them learn more about online safety so that they can themselves. Also, the young can do more activities with the old like talking, walking and traveling, or encourage them to learn something at the universities for the aged.

As students, you should study hard. More importantly, you should study in a smart way. Try these methods below

Spaced Repetition

According to Ebbinghaus, you'll easily if you don't review in time. After you read your study material for the first time, you'd better come back to it 6 hours later, then 24 hours later, 3 days later, 7 days later or even 14 days later and above. Repeat itleast 5 times, and you can almost remember everything.

 Jim Kwik's Technique(方法)

According to Jim Kwik an expert on reading and the memory, the key to understanding your reading material is to ask question. You can put a line down the of a piece of

paper. On the left, take notes of key information, while on the right, write down 3 kinds of questions —how, when and why. Among the questions, the most important is how you can use the key information. Connect it with the knowledge you've known. And think about what real life problems you can solve by using it. This helps to keep the information your mind.

The Feynman Technique

Studies show students can understand what they've learned better when theysomeone else. The Feynman technique includes 4 basic steps. First, study. Second, teach what you've just learned to someone with zero knowledge of the subject inwords. Third, find out which pars you can explain well and which parts you can't go back to the book and try to topic without looking at the book. understand the topic once again. Fourth, repeat the steps above you can explain the