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Around the corner sat an old vagrant(流浪汉), Bill, begging for money every day. However, there was1a disappointment in his eyes. One day, Sarah came up and gave him $20, a large amount of money for Bill. He was so confused that he asked her2she gave him so much money.

Sarah replied with a3, "I believe what goes around, comes around." With these words, she left happily4knowing something might happen to her. After she left, Bill found a5in his cup. Immediately he realized it should be Sarah's.

He looked all around but couldn't find her anywhere. Just as he6, he happened to come across a pawn shop(当铺).And after a few7, he decided to go inside to see how much this ring is worth.

"Four thousand dollars?"" he was8,"I wouldn't have to sleep on the street for months, if..."To sell or not, he was lost in thought.9, he took back the ring and left away.

For next weeks, he10looking for Sarah, but ended up with no result. Tired and11, one day he knocked on the door of a bookstore. Unexpectedly, there sat Sarah, working as usual.

Sarah was surprised in tears, "But I don't understand. Why did you12the ring? It could bring you plenty of13and even change your life."

"It's the least I could do. "Bill explained, "It was a wise lady who teaches14what goes around, comes around."

Thankful and totally moved, Sarah shared this story on the web to help collect money for Bill Only within a few days, she15over $100,000. Then on a spring morning, in Bill's cup, there was a cheque (支票) with a note, saying "What goes around, comes around".

Most viruses can be found and killed by our immune system as soon as they enter our bodies. However, some viruses, for example, the coronavirus, are sneaky. They are difficult to recognize and find. These viruses can cause deadly diseases, like COVID-19. Human-to-human transmission can easily occur, and pandemic will therefore break out. Vaccination is by now a simple, safe and effective way to protect us from the diseases.

   ▲   Vaccines are something that "looks" exactly the same as the viruses, mainly made from the viruses that are weakened or killed. They will not make us really ill. They only stimulate and activate * our immune system to work, telling it something harmful is coming in. The immune system will know what the "viruses" look like, and send B cells(lymphocytes) or antibodies to find and kill them. Meanwhile B cells will remember them for the next kill. A vaccine may also give us passive immunity by providing B cells taken from an animal or a human to play the same role.

Scientists have developed more than 180 vaccines to fight against COVID-19. The technical approaches of these vaccines can be a little different, but their aims are the same.

Take the inactivated vaccine as an example. In an inactivated vaccine, the coronaviruses are already killed or made into the ones unable to produce more new viruses. When the immune system "sees" them, it will try to kill them. The question is: without enough these viruses• how can B cells remember them? That's why we need to take the vaccine more than one time. Though this vaccine is safe, it might not be as effective as it is expected to be.

The live-attenuated vaccine is different. In this vaccine, the viruses are weakened, but they are alive. They can produce enough new viruses to train the immune system to kill and remember them, so people only need to take the vaccine once. The live-attenuated vaccine is considered the most effective, but there is a worry: what might happen once these viruses wake up?

Therefore, although vaccination is by now one of the best ways to protect us from COVID-19, it can be better.

All around the world, families celebrate special days together. Traditions for these days (be)very different. Some of them may surprise you.

Families in most countries have a special day to celebrate mothers. In Serbia, this day is on second Sunday before Christmas. On that day, children sneak（溜）into their (mothe)bedroom and tie her feet with ribbon（丝带）so that she can't get out of bed. Then they shout, "Mother's Day, Mother's Day! What will you pay (get) away?" Then the mother gives (they)small treats and presents as payment so that the kids "free" her.

In China, they say that (baby)are one year old when they are born. After that, all children celebrate their birthday on New Year's Day because that's when they grow a year (old). Actual birthdays are  (usual)celebrated with a big family meal. The tradition is that the "birthday boy" or "birthday girl" should fill their mouth with as many long noodles they can and then eat them. This is because in Chinese culture, long noodles are a symbol long life.

Last year, I did not like my English class. Every class was like a bad dream. The teacher spoke so quickly that I could (hardly) follow her most of the time. I was afraid to ask questions because of my poor (pronounce). I just (hide) behind my textbook and never said anything.

Then one day I watched an English movie (name) Toy Story. I fell in love with this exciting and funny movie! So I began to watch other English movies, too.    (although) I could not understand everything the characters said, their body language and the expressions on their faces helped me to get the meaning. I also realized I could get the meaning by (listen) for just the key words. Besides, I learned some (use) sentences like "It's a piece °f cake” or "It serves you right”. I (understand) these sentences at first. But because I wanted to understand the story, I looked (it) up in a dictionary.

Now I really enjoy my English class. I want to learn new words and more grammar so that I can have a much (clear) understanding of English movies.

 How many backpacks have you owned since you went to school? Backpacks  (become) common and popular among students in the past 30 years. If your backpacks become old, will you just treat them as rubbish and throw them away? Five years ago, a research  (show) that 85% of the old backpacks ended up in rubbish. But as we know, most backpacks are produced from different  (material). If we throw them away, they will be harmful  our environment.

Although some of the old backpacks are no longer of their right color or size, there are still many things you can do with them. Here are some  (use) ways for you. For example, do you feel it difficult to find  (you) tools in the house? You can solve this problem by  (make) use of your old backpacks to store all kinds of tools. Also, it is  wonderful idea that you can put your old backpacks online for sale. Besides, offering your backpacks to other poor kids is another good choice, as those old backpacks may make their life  (convenient) than before.

All in all, old backpacks are still of great value as long as we put them into use  (wise). Remember: rubbish can be turned into treasures!

O. Henry, a famous American writer of short stories, was born in North Carolina in 1862.

O. Henry was a pen name. His real name was William Sydney Porter. When he was a young boy, he did not go to school for long because of being born in a poor family, but he tried to teach himself everything he needed to know.

When he was about 20 years old, O. Henry went to Texas. There he tried different jobs. He first worked on a newspaper, and then had a job in a bank. But he got himself into some trouble. Some money went missing from the bank. O. Henry was believed to have stolen it, so he was sent to prison(监狱). During the three years in prison, he learned to write short stories. After he got out of prison, he went to New York and went on writing.

He wrote mostly about New York and the life of the poor there. People liked his stories, because almost all of them finished with a sudden change. This made the readers surprised.

Everyone knows that exercise is important. We all need to exercise. Doctors say it is good for us. It makes our heart and body strong. Children who often exercise do better in tests and schoolwork than those who don't exercise.

There are many ways to exercise. You can walk, run, swim, skate, or play ball games. Make sure you exercise in the following ways: You have to like what you are doing. Exercise enough but not too much. It's best to exercise twice a week. Thirty minutes each time is enough. Try all kinds of sports until (直到) you find one, two or even three sports that feel right for you.

You can exercise at fitness centers. They have a lot of equipment (设备) there. The equipment will help exercise your arms, legs and other parts of your body to make you healthy. Some people buy equipment for their homes, but it's very expensive.

What are most 13-year-old boys doing? Going to school, playingsports with friends and doing their homework.

TFBOYS is a singers' group started in 2013. Its name is The Fighting Boys. It has three members, Wang Junkai, Wang Yuan and Yi Yangqianxi. The other two boys were both 12 years old. They make albums(音乐专辑)and have won many awards(奖). Now the three boys are among the most popular teenage stars in the country.

Many people are interested in TFBOYS. After all, its members were still junior school students when they debuted. On weekends and holidays, they had singing classes, dancing classes and other trainings. In the fans' eyes, the group has a healthy and friendly image(形象). " We are of similar age," teens say," They feel like friends to us and we love their songs!"

Mary was so tired after her day in the garden that she went to bed early. Before she went to sleep, she thought about Colin and decided to go and see him after breakfast the next morning. A terrible sound woke her up in the middle of the night. It was Colin. He was crying and screaming. Then Colin's nurse came in. She looked worried.

"He's having a tantrum(发脾气)," she said quickly. "No one else can do anything. Only you can make him calm. He and his family all like you. Can you come?"

Mary was angry but she went. When she got into Colin's room, she ran to the bed. "Stop!" she shouted. "Stop! I hate you! Everybody hates you."

"I can't stop!" he cried and cried. "I can't!"

"You can!" shouted Mary. "You're just having a tantrum!" She stamped her foot.

"I have a lump on my back," shouted Colin. "I'm going to be a hunchback (驼背) and then I'm going to die." And he began to cry again.

"Let me see your back!" said Mary.

The nurse, Mrs. Medlock and Martha were all looking very worried. Mary looked carefully at Colin's back.

"There are no lumps on your back!" she said at last.

"Do you think I can live to grow up?" he asked the nurse in low voice. "Yes, if you keep calm and go out in the fresh air," the nurse replied.

"Perhaps … perhaps I can go out with you, Mary," Colin said. "Dickon can push my wheelchair. I really want to see Dickon and the fox and the crow."

Colin was quiet now so the nurse, Mrs. Medlock and Martha went to bed and left Mary alone with him.

"Did you find the door to the secret garden?" he asked her. Mary looked at his tired face.

"Go to sleep now," she said, "We can talk tomorrow."

-- from The Secret Garden

    Early in the morning, Mary goes to wake up her son. "Wake up, David. It's time to go to school!"

    "Mom, I don't want to go," David says.

    Mary asks, "But why? Can you give me a reason(原因)?"

    David answers, "Well, the kids hate(讨厌) me for one, and the teachers hate me, too!"

    "Oh, that's no reason not to go to school. Come on now and get ready."

    "Give me a reason why I should go to school, Mom."

    "Well, you are 50 years old, for one. And for another, you are the principal!" Mary says angrily.

Seniors(年长者) dancing on a public square is popular in China. I've learned that on the newspaper before.

Walking through the 1 park, the trees stand cold and bare(光秃秃的). The wind has shaken their yellow leaves to the ground. As I keep walking, a noise from the background is becoming 2 and clearer. Now, 100 meters ahead, is a group of women who are gathering at the side of the path. In the cold wind of December, they're moving their arms and legs to the 3. They are, of course, the dancing seniors.

It seems that if you go to any 4 space around China, you are likely to see these dancing women. 5 I first came to China, it was one of the first things that 6 me. That's because in Britain dancing outside is not a cultural 7.You won't see any age group swinging their arms and tapping their feet in a park. Usually people just 8 for exercise.

Some people find dancing seniors annoying because they make too much 9.But others respect their right to dance in public. With most of them middle-aged, they 10 have some free time to do 11 they like. There is no more work, and their kids have left.

Personally, I like seeing these women enjoying 12. They remind us of doing exercise as we get older. Besides, most of them have raised whole families. Now it is their time to have fun and enjoy some peace.

 Jack always talked about how many friends he had at school. One day, his grandpa said to him, "Jack, I don't think you have as many real friends as you think." 

 Jack didn't agree with his grandpa. However, he wasn't sure who his real friends were. His grandpa said," I have something to help you to know this." Grandpa left and soon came back. He seemed to carry something in his hands, but Jack could see nothing there.  

 "Here is a special chair for you. You can't see it because it's invisible. Take it to school tomorrow and show it to your friends. When you try to sit on it, it will help you know who your real friends are." 

 Jack took the "chair" to school. He asked everyone to stand around him and his "chair". "Look! You'll see something great." 

 Jack tried to sit on the "chair". Of course, he fell to the ground. Everyone laughed loudly. Jack tried again. But again he fell to the ground. He kept trying to sit on the "chair", and kept falling to the ground… On his last try, he didn't fall.  

 Jack looked around and saw George, Lucas, and Diana—three of his best friends. They were holding him up so that he wouldn't fall down again. However, many others who he thought of as his friends did nothing. They just stood there and laughed at him. Then Jack knew who his real friends were.  

    An old excellent worker had worked for a house-building company for so longit was time for him to rest. He decided to live a relaxing life with his familyleaving the company. So he told his boss about his plan.

    The boss felt sad because his good worker wanted(leave) his company. He asked the worker if he could help the company build just one more house. The worker agreedhis heart was not in his job any more. He didn't spend enough time(choose) good materials（材料）He wasn't willing to spend much time and energy on the last house.

    After he finished his job, the boss came to check the house. Then he gave the front door(key) to the worker and said, "This is your house my gift to you for working for the company so well."

    The worker was(surprise)! If he had known he was building his own house, he would have built it(careful).

    Sometimes we arethe worker. We do something carelessly. We may think the things haveto do with us. However, life is always full of the unexpected. We should try our best to do everything well.

The Earth is about 4.6 billion years old, but the humans have lived on it for just 200, 000years. However, during the short time, humans have achieved a lot of amazing things.

The achievement list is almost endless. The invention of the airplane has changed our lives. The discovery of antibiotics (抗生素) has saved the lives of millions of people. Can you imagine living without electricity? What about the printing press (印刷术) ? Without the printing press, you wouldn't be reading this. In the last 50 years, there have been great achievements in communication, such as radio, TV, computers, the Internet and smartphones(智能手机).

What about the arts? 'The arts have brought pleasure to many people, but are the Beatles and Bach more important than antibiotics? It's hard to answer, right?

Finally, we must not forget humans’ early achievements. Now we can't imagine modern life without cooked food and cars.

What are humans' greatest achievements? To answer the question, we need to decide what we mean by "great". Or is it just something that makes us say "Wow", like the Great Wall? What do you think?

Lonnie Johnson always loved taking things apart（分开）. He /'sʌmtaɪmz/put them back together. Other times he made new things from different （part). He learned how to use tools from his dad.

At 13, Lonnie put an old engine（发动机）on a homemade go—cart. He loved driving it around. He dreamed of being inventor. By high school, Lonnie built a remote—control robot from some waste things. This won him first prize at the Alabama State Science Fair, His friends called "The Little Scientist". In college, Lonnie was an excellent student. After that, he （become) an Air Force officer, rocket scientist and business leader. he never stopped inventing. You may have played with his most famous invention—the Super Soaker, a kind of water gun. Lonnie got the idea for this /tɔɪ/ while working on another invention. When he tested a homemade part in his bathroom, it shot water ／ə'krɒs/ the room.

Today, Dr. Lonnie Johnson has more than 100 （use) inventions. However, he still keeps （try) new things.

In Chinese culture, tigers are thought of as the king of all beasts (野兽). They symbolize (象征) power, energy, protection and so on. So you can see pictures of tigers on the walls to prevent bad luck.

Tigers have an important cultural meaning not just in China, but across Asia. As they usually live in Asia, for many people in the West they have become a cultural symbol of Eastern countries. For example, strong economies (经济) in the East——Singapore，Republic of Korea, China's Hong Kong and China's Taiwan—were called" The Four Asian Tigers".

Instead of tigers, lions are considered as the king of all beasts in the West. Brave warriors (战士) were given the name "the lion". In Europe, the animal is a national symbol for England, Norway, Spain, Belgium and 13 other countries. But in the West, tigers are also seen as a very powerful animal. In English, if you want someone to calm down, you can say to them, "easy tiger".

Tigers are also one of my favorite animals. I first learned about the beauty of tigers as a child, while watching Animal World. If you ask my mom, she'll tell you that my favourite toy was my toy tiger, which I still keep to this day. I love China's twelve animal years because they show the connection, understanding and respect (尊重) that humans can have for animals, As an animal lover, I feel so sad that they are in danger and I want to help protect them Just like the tiger is a symbol of protection in Chinese culture, we can only hope that in the Year of the Tiger more people can learn about tigers and help protect them completely.

When a new day begins, dare to smile gratefully.

When there is darkness, dare to be the first to shine a light.

When something seems difficult, dare to do it anyway.

When life seems to beat you down, dare to fight back.

When there seems to be no hope, dare to find some.

When you're feeling tired. dare to keep going.

When love hurts you, dare to love again.

When another is lost, dare to help them find the way.

When a friend falls, dare to be the first to reach out a hand.

When you feel great, dare to help someone else feel great too.

When the day has ended, dare to feel as you've done your best.

Dare to be the best you can…

At all times, dare to be!