Can you imagine a pair of shoes that could tie themselves? All you have to do is put them on and push a button. Well, this idea is becoming a reality. The shoe company Nike created the self-tying shoe! This idea first came from the film Back to the Future II, Nike has been working for years to create a shoe that can do this in real life. They have finally done it with Nike HyperAdapt 1.0.

    So how does it work? According to Nike, the shoe is “powered by an underfoot-lacing mechanism(脚下系带装置) small motor that has the power to lace the shoes, All you have to do is put them on, and at first, the shoes are very loose(松的). But then you can push the "+" perfect fit for you. To take them off, all you have to do is push the "-" button, and the shoes will be easily off.

    They haven't been widely released to the public yet, and the price of the shoes is quite high.

    Nowadays, computers and Internets are playing an important part in our life. Some people even say they can't live without them. We usually need to set passwords (密码) when we use computers and Internet. But not all the passwords are safe. In order to keep our accounts (账户)and personal information safe, we must learn how to make safe passwords.

    How can you make your computer and Internet passwords safe? Experts have some advice for you. You'd better remember the advice and they are useful for you. Here are the suggestions.

    Firstly, make your password out of capital(大写) letters. If your password is made of capital letters, it will be difficult for others to get into your account. It only takes a hacker(黑客) 10 minutes to work out a six- letter password made of small letters. But the same password in capital letters takes 10 hours to work out.

    Secondly, add numbers or symbols to your passwords. It may be much safer. Sometimes such password is not easy to remember, but it is really safe.

    Thirdly, never use personal information for passwords and use different passwords for different accounts. Experts say that a user should change his or her passwords every 90 days. In this way, hacker won't guess your passwords.

    What is the sky? How high is it? What color is it? What birds can live above it? These questions are difficult to answer, aren't they? In fact, the sky has no color. Then why does the sky look blue?

    We know that there is air around the world. When planes fly, they need air to lift their wings. Planes can't fly very high. That is because the air gets thinner when they go higher. The same will happen to us if we go high enough. If we go up about 1,200 kilometers from the earth, we'll find no air there. Some birds can fly into the sky as high as a plane, but they cannot fly or live without air.

    Looking up above us, you will see the blue sky with white clouds. It is usually light blue. The color would be bluer when you see on the top of a high mountain. And you will see fewer clouds in the sky between you and the sun. Sometimes the sky doesn't look blue. When the sun rises and falls, you will see red, orange and other colors in the sky, such are the most beautiful moments of the day.

    Who can see the colors of the sky high above the earth? The astronauts! They can see those beautiful colors of the sky from the outer space. However, before flying into the outer space, they sit in a spaceship high above the earth and there is no air at all. The sky would be that dark and its color would be black.

    Now you may understand that we see colors because the air scatters (使散射) the sunlight. Light travels through the air. Without air there would be no colors.

With the growth of pet owners as well as the rise of "Its Economy?，pet cafes, a new business model, are becoming increasingly popular across the country.

For Yu Miao, a cat owner in Hangzhou when she chooses a coffee shop, what matters most is whether it is pet-friendly. ‘There are so many coffee shops in Hangzhou. As a cat owner, I sometimes take my cat out, and I would like to choose a coffee shop that allows my cat to be with me in it," she said.

China's first cat-friendly coffee shop opened in Guangzhou in 2011. With the number of animal lovers like Yu growing in recent years, pet-friendly coffee shops are sprouting up like mushrooms after a spring shower. In February this year, there were more than 4,000 pet-friendly coffee shops in China.

With the development of pet ownership market, pet-friendly coffee shops in other cities are also enjoying wide popularity." During weekends, sometimes visitors have to wait in line before being seated. As customers are all here to enjoy themselves with animals, they think the experience is worth the visit.'' said a pet-friendly coffee shop owner in Beijing.

In Shenzhen, Heytea runs a pet-friendly theme store in Xihui city, Luohu District. The theme store meets nearly all the needs of pet lovers and provides them with a fantastic experience. 

Pet-friendly coffee shop can be mainly divided into two types. One keeps cats and dogs in the shop and enables customers to play with them. Customers need to pay for admission fees in addition to the costs of drinks and snacks. Taking Shanghai as an example, admission tickets for time- limited cat cafes are from 40 yuan to 200 yuan per hour.

Do you know the Monkey Buffet Festival in Thailand? It is on the last Sunday of November. It is a great day for monkeys in Thailand. The festival has a history of about 35 years. People there think monkeys can bring good luck to them. So, to thank monkeys, they have this special festival. 

On that day every year, people put lots of fruit, vegetables, cakes and even drinks on tables outside. They are all for monkeys. Many people come to see monkeys on that day. 

During the festival, there are a lot of interesting activities about monkeys. Young people always dress like monkeys, and they sing, dance and play some music on the streets. 

Monkeys always live in groups. Most of them live in the trees. They are good at running and jumping. They eat fruit, vegetables, plants and birds' eggs. Monkeys are clever. Do you think so?

Can you cook by yourself? Do you like the homework of making a meal ? These days, primary and middle school students are required to take the Practical Activity Class(实践活动课) at least one class hour every week. The topic of cooking was discussed mostly by parents and students, Learning practical skills plays an important role in shaping(塑造) a person's character for sure.

 Some schools and students have already practiced their practical activities. Gu Quan, 13 years old, from No. 18 Middle School, used to be a lazy boy. In his own words, he hardly ever did any housework. But things have changed since No. 18 Middle School made housework part of its students' homework. Doing the dishes, cooking and making the bed—All of these tasks have become part of Gu Quan's daily life.

 At the beginning of each month, every student gets a list of housework to do every weekend. Their parents help them keep a record of their performance. The tasks are common and simple in daily life, such as sweeping the floor, washing cups and cooking food. On holidays like Mother's Day, students should prepare presents for their mothers. Huang Yixi,14, has learned several life skills, including cooking. "I used to be afraid of fire," she said. But she managed to overcome her fear and complete her cooking tasks. At the same time, she also learned how tired her mother gets after doing housework every day. On Mother's Day, she made a cake for her mother to show her thanks. "I' ve begun to better understand my parents and want to help them more," she said.