Long ago, people did not need money. {#blank#}1{#/blank#}

    As time passed, people learned to raise animals and crops. Sometimes, families produced more than they needed, so they started to trade (交易) with other families. Later, people began to use money as a means of exchange. {#blank#}2{#/blank#}They used shells, rice, salt, large stones, etc.

    During the 600s BC, people began using coins as money. They soon found that coins were easier to carry than goods (货物) and lasted a long time. {#blank#}3{#/blank#}

    The Chinese were the first to use paper money, probably as early as the eleventh century. The Italian traveller Marco Polo saw the Chinese using paper money when he visited China in the 1200s. {#blank#}4{#/blank#}

    Today, we have many ways to pay for things. {#blank#}5{#/blank#}Often, people prefer to pay for things by card. Paying with a card is easier and safer than carrying around a lot of "real" money.

    It was Sunday yesterday. Michael sat on the sofa and watched TV. He was very relaxed. His mother was doing the dishes. Suddenly, she felt terrible. She had to stop. Michael came to his mother and asked, "Are you all right, Mom?" "Yes. I'm OK, but I need to take a rest," said his mother.

    Michael felt sorry for his mother. He thought he should help his mother do the dishes. She felt terrible because she was too tired. So he did the dishes and cleaned the room when his mother was lying in bed. Michael felt happy because the room looked clean.

    When Michael's mother felt better, she went to do the dishes. But she was surprised to see the clean room. "You are really a great boy," she said happily. Michael was happy, too.

    My name is Bill. I 1 in Sun Junior High School. There are many 2 in my school. In the front of my school is the 3 building. It's a building for teachers. Behind it is the library building. It's my favorite place, 4 I like reading. After school, I always read books or do my homework there. 5 is the classroom building? It's next 6 the library. Behind the library is a dinning hall. There are different 7 of food like hamburgers, bread and vegetables. If students want to have lunch there, they 8 pay(付款) 50 yuan a week. There is a gym in my school, too. It's behind the classroom building. My friends and I like playing games there. I 9 like the teachers in my school. They are very kind. They often take us out to 10 pictures or watch movies. We always have a good time.

    English playwright Arthur Wing Pinero said, "Where there's tea, there's hope." Similarly, a Chinese saying goes that "Firewood, rice, cooking oil, salt, sauce, vinegar and tea are the seven necessities to begin a day."

    Tea is, without doubt, welcomed all over the world. According to Statista, a German website for statistics (数据), global tea production reached about 5.8 million tons in 2018. It has become the most consumed beverage (饮品) in the world – after water, of course.

    According to the UN, tea is much more than just a hot drink. It's a big part of many cultures around the world. You probably know that people in China use top-grade tea to show respect when receiving important guests. Meanwhile, the British tradition of afternoon tea is an important part of that country's identity. Making Malaysia's pulled tea has become a sort of art form, where drinkers take pride in its entertainment aspects.

    Apart from its cultural significance (意义), tea is also a medicine, used from ancient times to modern day. "Tea is cold and lowers the fire," Chinese Ming Dynasty herbalist Li Shizhen once said. The health benefits of tea are still being discovered today: preventing heart disease, obesity and cancer have all been linked to drinking green tea, according to the National Center for Biotechnology Information in the US.

    Hot or cold, bagged or loose-leaf, tea is more than a drink – it's a social custom and also a magic medicine, a link to the past and a way of life.

Back home, Qian at once {#blank#}1{#/blank#} helping China develop a space program. He started the Institute of Mechanics in Beijing, where he trained young scientists. He worked on many important space {#blank#}2{#/blank#}. In 1960, China's first rocket and first missile were launched(发射) {#blank#}3{#/blank#}. In 1970, China launched its first satellite. It is largely because of Qian's {#blank#}4{#/blank#} that China so quickly developed a space program, and became only the third country to send a manned rocket into space in

2003. 

Qian watched this rocket launch on television. He was by he will always be {#blank#}5{#/blank#} for his great contributions(贡献). He working so hard for his country, even through difficult times, helping develop the space program that pushed China into the future. 

Harris was a very small hare(野兔) with very big feet. "Why do I have such big feet, Grandpa?" Harris asked. "All hares have big feet, Harris. I will show you 1 ," said Grandpa.

Grandpa hopped(单脚跳) 2 into the air. Harris copied(模仿) it. He kept practicing over and over again until he could hop as high 3 Grandpa. Then Grandpa took Harris up to the 4 of the mountains. He told Harris, "With your big feet, you can hop to the top of your world."

Grandpa taught Harris lots of life 5 . For example, he taught Harris how to 6 a cool resting place in the earth when the days were hot. One summer afternoon, they stopped to 7 the grass. Harris shouted happily, "Look, Grandpa! My feet can 8 me away from the hot sun! I'm so 9 to have such big feet." As time went by, he got to know the10 of his feet.

One day Grandpa noticed a wolf looking closely at them from a distance (从远处). He kept cool and spoke 11 to Harris, "The most important thing about your big feet is they can 12 you to run very fast." Harris began to run and didn't stop 13 he heard the howl (嚎叫) of the wolf. "Grandpa, why aren't you running with me?" Harris ran back and 14 sadly.

"Little Harris, I'm growing old. It's time for you to learn to live in 15 own world."

Harris kept Grandpa's words in mind and he believed his big feet would take him to the end of the world.