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A digital twin is a copy of things like the products or persons in the online forms. Like humans, a digital twin can also develop itself as long as they are fed with enough data (数据).

In 1970, when Apollo 13 was carrying out its task in space, something went wrong with the spaceship, leaving astronauts stranded (困住) 200,000 miles from Earth, NASA engineers used spacecraft data to recreate the conditions of the broken part of the spacecraft. This method allowed them to develop solutions that finally brought the astronauts safely home. This event is widely thought as the birth of digital twins. Since then, this technology has been used in many fields, including business, medicine, and more recently, human modelling.

One of the most fantastic uses of digital twins is in health care. Professor Declan O'Regan, an AI expert, shows the new method can help doctors treat certain illness easily and quickly, and it can even help doctors to find ways to stop some kind of illness before it is too late.

Another successful example is to use the digital twin to change the sports science to some degree. Compared with the past when the coaches needed to set up a program to help train the sportspersons, they now use the data to build the digital twin to help the athletes to improve their skills and avoid accidents in sports.

Not everything about the digital twin is good. It is clear that the new technology will influence us a lot, but what direction it will take in the future remains to be seen. There are some doubts over it, as it will result in problems related to ethical (道德的) consideration.

Themes (主题) make marathons fun and meaning. Runners run for helping sick kids, memorizing important events, or just enjoying nature. A famous marathon in Gisborne, New Zealand, is known for being the first city in the world to welcome the sunlight every day. Runners can greet the sunrise as they run along the golden sandy beaches.

Marathon routes (线路) let people know more about this old sport. Some routes are very challenging for runners. Runners of all skill levels can sweat (流汗) freely and push their limits (极限). Some routes are well planned for runners to explore the many sides of a city. For example, the route of the Great Wall Marathon takes the runners along the great wonder of the world. In fact, it's also a chance to get to know Beijing, its people and local culture.

A marathon is quite a journey for runners to enjoy the run, challenge themselves and experience the culture. There is so much more behind the race for us to explore.

Bruce Kelly, a reporter interviewed some people and asked, "What are some of the good moments of your life?" Here are some of the answers.

"I always failed my English exams. But thanks to my teacher, Ms. Green, she helped me find the learning methods. I was taught to review what I learned every day. I was asked to finish grammar exercises as many as possible. Now I can always get high scores in English tests."

——Jack,12 years old, from No.2 Middle School

"My parents always helped me decide everything. For example, they asked me to focus on my study instead of practicing my hobby——running. But I'm 14 years old! I should be allowed to make my OWN decisions! So last Friday I had a long talk with them. In the end, I won! Now I'm allowed to run and remain in the school team."

——LiuYu, from Shandon

"I have lots of great moments. For one thing, I've traveled a lot. I lived in Italy a few years ago. Then after Italy, I went to America and worked with a team of volunteers. We were rebuilding homes after a major earthquake for two months. It was hard work but so worth doing. Life has been interesting so far."

——Alice, 35, a high school teacher

— Maybe you can if you get up ________.

提示：1.What do you think of your school life?

2.What do you do at school every day?

3.What's your favorite subject and who is your favorite teacher? why?

要求：

1.文中不得出现真实姓名和学校名称。

2.语言通顺，表意准确，条理清晰，书写规范。

3.词数80左右。

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Talk to your family.

Talking is the key to a happy family. It helps the family to show what they are thinking.

Spend time together.

There are many ways to spend time with our family,such as making dinner, watching TV, going for a walk, or cleaning the house.

Say "thank you" when your family help you. And let them know that you thank them for what they do for you. A cool hat, a good book... They can be very happy.

Say sorry.

A good breakfast for your family can show you are sorry, too.

A. Show thanks.

B. Why should we have a happy family?

C. Here are some good ways for you.

D. When you do something wrong, you should say sorry.

E. Also you can buy some small gifts for them.

F. If we often talk to our family, we can know much about them.

G. Help your parents.

Firstly, persimmons (柿子) are a popular choice. They can help people stay warm and protect (保护) their bones. Secondly, apples are highly popular. In China, it's believed that "Eat an apple after meals, even old men can be as strong as young men." Thirdly, pears are great for clearing away heat (热) from the body. Fourthly, duck meat is a traditional food in Taiwan province and Fujian province. It is a way for people there to gain weight (增重) during the colder months. Fifthly, chestnuts (栗子) are another excellent option (选择). Chestnuts are warm and sweet. They are good for the stomach and the blood. Lastly, dates (枣) are also good for health. But eating too much can be harmful.

Do you have a tidy desk or an untidy desk at home? Do you want to keep your desk clean and tidy for a long time? A tidy desk helps you find things easily and do things well. It is also helpful for your study. Doing these can help you with it.

First, only put things you need on your desk. For old books, you can put them in the bookcase. Get a box for small things you don't need every day, you can put your pens and pencils in a pencil box.

Second, don't put food or drinks on your desk, because they can make your desk dirty. Go to the kitchen (厨房) when you want to eat.

Third, put important (重要的) things next to you. Then it is easy for you to get them. If you have a drawer (抽屉) under your desk, you can put things there every day.

Fourth, clean your desk every day. If you do it every day, you can have a new day with a tidy room the next morning.

If you do the things, you can have a tidy and clean desk. Why not have a try now?

It is eight o'clock in the evening. Zhang Peng's grandma is telling him about her life.

I'm sixty years old now. I'm very happy. I can eat delicious food. And I live in a big house. I have a big television and a telephone.

But life was very different many years ago. I was young then. I had two sisters and three brothers. We lived in a small house. My mother cooked on a fire. We didn't have enough food to eat, so we were always hungry. We couldn't go to school. And we didn't have new clothes. We usually went to the town on foot.