参考词汇：流行病epidemic 疫情 epidemic situation 新型冠状病毒 novel coronavirus
Dear Medical workers，
I am Li Hua,a high middle school student in Shanxi. I'm writing to express sincere gratitude to you all for your devotion and sacrifice in this battle against the Novel Coronavirus.
In this epidemic, it is you who, despite the lack of equipment and the potential of infection, desperately rescue those infected but striving for life. It is also you who have shed new light on the virus with expertise to build up our confidence to defeat it. It is you who deserve all the admiration and love!
I can never express our thankfulness too much for your selfless contribution. It's widely believed that our joint efforts China will win the battle and make a quick recovery.
Good luck and stay well!
参考词汇：垃圾分类 trash sorting
Having learned that you are interested in the trash-sorting program promoted recently in China, I am here writing to give you a brief introduction.
As far as I know, Shanghai has become the pioneer of our country's waste sorting policy. As of July 1st this year, the residents in Shanghai have not been able to dump their waste bags in whichever bin was closest. On the contrary, domestic waste is required to be classified into four categories: dry refuse, wet trash, recyclable waste and hazardous(dangerous) waste.
Faced with the new rule, many citizens in Shanghai are finding it a little too complicated, with every item of waste now under careful scrutiny(examination) and classification. Still, there are more people who warmly support the policy because it helps people to cultivate greener lifestyle habits and helps China to become a more beautiful country.
As we all know , the time of 5G technology is coming , it is called the fourth industrial revolution , future of computer science lies in the artificial intelligence，it is the research and artificial simulation of human thought and eventually be able to make a human like to think the same machine , for human services and to help people solve problems.
After all, people thought it was unique, there are feelings, there are a variety of character, this will be very difficult to achieve in the machine.In fact, to do the same as the human thinking machine, the only one of the artificial intelligence, is by no means all. Through the study of artificial intelligence, it can resolve all kinds of scientific problems, promote the development of other science will have a great impact on all people's lives .
I believe that the science of artificial intelligence is waiting for humanity to explore it step by step .
假如你是李华Li Hua，你的英国朋友Peter给你发来微信，想了解一下你的家乡自“十九大(the 19th National Congress of the Communist Party of China)”以来所发生的变化，请你用英文给他回复。
内容如下：1、精准扶贫(targeted poverty reduction)，效果良好;2、环境保护得到了明显改善。
I’m glad that you are caring about the development of my hometown. Now I will tell you something about it.
Great changes have taken place since the19th National Congress of the Communist Party of China. The targeted poverty reduction has reached its ideal aims. Many poor families have got effective help from local government and have improved their life greatly. Many old houses are replaced by new tall buildings which are surrounded with green trees and colourful flowers. The rivers that had been polluted seriously before are getting clearer and clearer. Besides, all kinds of fishes return the rivers. The sky is filled with white and cleaner clouds.
Please come to visit my hometown in the near future.
The Advantages of Online Payment
Online payment has been advocated around the world, which is the future way to pay bills. In China, Alipay is popular everywhere, even the small business can be finished by this advanced way. People play the joke that they don’t need to worry about the lack of cash. The advantages of online payment are obvious.
Firstly, it saves people’s time to pay bills. The use of online payment is carried out with a smart phone. Especially when we go to the supermarket, there are always a lot of people waiting in the long line. The process of costing customers’ time is to take out the cash or use the credit card, because both customers and cashiers need to count the money or check the bills. But now the cashier can just scan the phone and the bill will be paid and the customer can check quickly.
Second, people don’t have to worry about getting the fake cash. Many years ago, people were easy to get fake money as they received the change. But now, as the cash have been used less, people won’t receive the fake cash without paper money. With the development of new applications, our life will be much convenient.
参考词汇：沉溺于be/become addicted to 网瘾：Internet addiction
I am glad to hear from you. As your close friend, I’d like to talk about the harm of Internet addiction to you as I feel worried to know that you have wasted lots of valuable time playing the Internet games.
As we know, the Internet is a convenient tool to improve our knowledge and skills. However, our life will be greatly affected if we are addicted to it. For example your grades may go down and your health will be going from bad to worse. To make things worse, it can also damage the relationship with your family. So I think it is high time that you got rid of the bad habit. It is a good idea for you to read some meaningful books and do some physical exercise.
I am looking forward to hearing your good news soon.