13．Grow in high school
　　High school is a time to find out who you are, what you're skillful of, and what you hope yourself to be in the future.
　　Last year, I found myself lost in Algebra (代数). I truly didn't find math the least bit (1)      , so I gave up trying. Most of the homework tasks and tests were big trouble to me and I would get so upset that I could not get the topic. I ended that year with a D. I knew I could do better and that grade did not represent me, so I signed up for our school (2)       for students who were behind in their studies, like me. It was a 4﹣week program, and I was ready for a (3)      . I also asked my math teacher, Mr. Shuster, for more help. I needed his guidance to help me better understand the materials. I knew that with belief in myself, I would become (4)      . Finally I turned my D to a B in the following exam. This experience made me realize that no matter how hard something is that you're going through, there's always a way around it with hard work.
　　Albert Einstein didn't (5)       speaking until he was four, reading until he was seven, and was thought to be mentally ill!He went on to win a Nobel Prize (诺贝尔奖). We often hear stories of other people's successes. However, we don't seem to understand how they got there. The only way to truly know who you are as a person is to think over and over on your (6)      . Did I let them push me down or did I overcome them?Once these blind points are recovered you can act on them and (7)      . If you can build on your failures, you can use them as a stepping stone. I learned that I could do more than I thought because of this. High school has (8)       me into the knowledgeable, confident person I am today.

14．　　Which will you take part in?
　　Here is a guide to the largest and most popular yearly cultural celebrations in different places. Maybe you will be interested in some of them.

15．　　Our class teacher was on leave. He taught us Maths. I being the monitor of the class went to see the headmaster asking for some teacher to our class. The headmaster told me that many teachers were on leave on that day so it was not possible for him to send any teacher to our class. He asked me instead to keep the class busy and do some teaching. It was the order of the headmaster and I had to take the "job".
　　Our class is considered to be the best class in the school. Many a time we have won the flags of cleanliness, discipline (秩序), studies and sports. The students are very much well-behaved. It was these advantages of the class that gave me some confidence to face my classmates as a teacher though I was one of them. I decided to do with the homework assigned by the teacher the day before. I asked the students to show me their homework. They readily showed me their notebooks. I marked one sign on them for checking.
　　After checking all of the homework I found that many students had not done the complete homework. They had found some questions difficult and had been unable to solve them. I took up those difficult questions one by one. I had done all the questions and knew them well. I solved them on the blackboard for those who had not been able to do them. The class was very much cooperative and they were very happy. They asked me to give them more questions to solve for the next day. I gave them five more sums of the same exercise as homework. The period came to an end. I was happy that I had successfully managed the class without my teacher.
　　I guess that day was the best day of my life. ..

16．　　With people in the whole world suffering from the COVID-19 breakout, immunity (免疫力) draws everyone's attention.
　　Immunity helps animals fight against harmful things. When cells and organs in the body work together to offer immunity, they form the immune system. To an animal's body, the immune system is just like the army to a country.
　　All animals have an immune system that fits their living environment. However, different animals have different immune systems than others.
　　A research about bats shows that they carry more than 60 viruses (病毒) within their bodies, including the world's deadliest viruses such as Ebola and SARS. But they don't show any signs of disease. Why?According to the researchers, when bats fly, their body temperature can reach as high as 40℃. This kills most of the viruses, keeping the bats safe from infection (感染). At the same time, bats have very special immune systems, which allow them to live with many viruses and do better in fighting them. This means if the same virus infects a bat and a human, a human will likely catch a disease, while a bat can remain uninfected and perfectly healthy. Besides bats, other wild animals like snakes also have their own immune systems to protect themselves from infection.
　　Another interesting study reported that the crocodile serum (血清) had stronger effects in fighting against deadly viruses than human serum. This shows that the immunity of a crocodile protects them more, as compared to a human. Scientists are now studying with all their effects to find new ways to fight against different kinds of viruses.
　　In conclusion, some animals do have a more developed immune system than others. This is because each kind of animal faces different challenges in their life, which causes their immune systems to fit in different conditions and keep living in very specific ways that are best for their life.

17．　　From driver-less cars to voice control in the house AI (人工智能) has developed so fast.
　　"AI is going to change the world more than anything in the history of mankind. More than electricity." said AI expert Dr. Kai-Fu Lee. That's true. According to a research by scientists at the University of Oxford, AI will be better than humans at translating languages by 2024, writing school essays by 2026, selling things by 2031, writing a bestselling book by 2049, and treating diseases by 2053. In the next few years, AI will become an important part in our lives.
　　These are just a few examples of how AI will change the future. But wait, what about jobs?Will they steal our jobs in the future?
"AI will take our jobs!" is the most common fear. In fact, with AI automating (自动操作) all kinds of work, we can think of a more comfortable future for ourselves with millions of new job chances. According to a report on the Future of Jobs by World Economic Forum, AI will create 58 million new AI jobs by 2022. There is an excellent chance that AI will replace humans in most of the mental tasks by 2030. However, that does not mean it will take away jobs. Taking India as an example, the Indian AI industry doubled in size in 2019 compared to the year before. In just one year, three times more companies are working on AI-based projects and this is likely to continue. India almost doubled its AI engineers in 2019 (from 40, 000 in 2018 to 72, 000 in 2019)but still faces a talent shortage. Top technology companies are in a race to implement AI in our day-to-day lives-which will lead us to a really exciting AI future.
　　AI Future is coming soon!And there will be more new jobs in the AI industry. Do you want to be a part of this fourth industrial revolution (革命)?Will you upgrade your skills to stay ahead or will you remain still and slow in the industry?The choice remains with you. With the process of education and training, now is the time to prepare for the age of AI.

18．　　Where did the moon come from?
　　How much do you know about the moon?Is it older or younger than the Earth? Where did it come from?Let me take you back to the earliest days of the Earth, four and a half billion (十亿) years ago. At that time, the Earth had no moon. It was moving around the Sun alone.
　　The early Earth was hit by rocks and comets (彗星). Today, there are no marks left from this huge ball. But to know more about the hitting, I've come to the Arizona desert to see a great hole in the ground. This is a beautiful, large and round hole, a near﹣perfect circle. It was formed when a shooting star fell down strongly into the Earth fifty thousand years ago. It's amazing how much damage that one passing rock can cause.
　　It must have been a mess with many rocks hitting the Earth. And then along came something much, much bigger. Another planet, the size of Mars, came into the path of the Earth. It was on the way to hit the Earth. It hit the Earth with a very fast speed. It was unbelievable and difficult to guess the power broken out by such a hitting!The hitting sent a large amount of running rocks into the path of the Earth. After the strong hitting, the broken pieces got together into a ball and the moon was formed, just 14, 000 miles away from the early Earth. This was the closest point it could have been. If it were any closer, the gravity (重力) would have pulled the broken pieces falling down strongly back to the Earth and there would be no moon.
　　Today the moon is just a rock without light but back then, it was a hot and round ball in space burning brightly. It must have looked amazing:a really large orange disc in the sky.
　　Imagine the scene:the first moonrise over the early Earth. Our world was no longer alone. It has a huge, powerful neighbour, and ever since then, the Earth has been a very different kind of planet.

1. When was the Earth moving around the Sun alone?
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2. What hitthe early Earth?
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3. How did the moon form after the strong hitting?
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4. What was the early moon like?
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5. What do you think of the very first moonrise?
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19．疫情防控，人人有责！
假如你是李华，你受学校学生会的委托，给你班交换生Peter发送封邮件告知他学校有关疫情防控的要求，并分享给他你平时进行个人防护的具体做法。
提示词语：wear masks，wash hands，keep in distance，avoid crowds，make fewer trips outside，check body temperature，epidemic prevention and control疫情防控，disinfectant wipes消毒湿巾
提示问题：
•What school rules should you follow？
•How do you usually protect yourself？
Dear Peter，
I'm glad to write to you.__________
Look forward to seeing you soon.
Yours，
Li Hua

20．科学技术是第一生产力, 创新是引领发展的第一动力．
中国人民勤劳睿智, 创新产品层出不穷, 日新月异．假如你是李华, 你们学校英语社团正在开展"创新生活"主题征文活动, 请结合自身经历介绍你日常学习或生活中经常使用的新发明, 说说你对它的评价及它带给你的改变．
提示词语:technology, High﹣speed Train, shared bikes, convenient, develop
提示问题:
•What new invention do you use in your daily life?
•What do you think of it?
•How does it affect your life?