Each one of us shares this planet with over seven billion others. And we all need1. People and products need to move from city to city and country to country. However, we all know2most cars, motorcycles, boats and planes cause air pollution. They are also3. This is a serious problem in many cities.4inventors are coming up with creative ideas to try to reduce the pollution and noise.

    In many cities around the world, motorcycles are very5. Now Vietnam has around 33 million motorcycles and China has almost 120 million. Motorcycles are a faster and cheaper way to get around a city than6. Yet air pollution is a growing problem. In large cities, people7it is difficult to breathe. To solve these problems, an American company designed an environmentally friendly motorcycle. It uses electricity as fuel (燃料). As a result, there is8pollution. It's also quiet and fast. This makes9a good choice for getting around a city.

    The Italian city of Venice is a city with only a few10. There are no cars in the city centre.11cars, water taxis and buses carry people along the city's canals (运河). However, they cause pollution,12to the water. English engineers Dick and Jem designed a solar-powered (太阳能的) water taxi. The water taxi13run for a day after being charged (充电).

    Planes also cause air and noise pollution. Designing an environmentally friendly airplane is a real14. Some airplane companies have15to solve the problems. Swiss engineers have gone one step further. They developed a solar airplane. This airplane even tries to travel around the world.

In 1990, when I {#blank#}1{#/blank#} (be) nine years old, I wanted very much to find {#blank#}2{#/blank#} pen friend. I found Ashley's address in a magazine, and decided{#blank#}3{#/blank#} (write) to her. I sent off my letter with a little hope. Very quickly, I received her letter. {#blank#}4{#/blank#} my surprise, Ashley was only one month {#blank#}5{#/blank#} (old) than me. I learned some new expressions from her. I {#blank#}6{#/blank#} (real) liked this new friend.

Letter after letter, year after year, Ashley and I continued to write to one another. A letter would be received and I'd write back right away. We would send each other birthday and festival {#blank#}7{#/blank#} (gift).

Eight years later, my parents decided it was time {#blank#}8{#/blank#} me to meet this friend. They drove me down to Mississippi for a few days. We {#blank#}9{#/blank#} (have)a fun time together. We did the things that teenage girls love to do.

Twenty—five years after the {#blank#}10{#/blank#} (one) letter, Ashley and I still have an amazing friendship. Although we don't write letters now, we communicate through mobile phones and the Internet.

Many studies about language learning ask the question: What makes a good language learner? Here is some of the most {#blank#}1{#/blank#} (use) advice from studies.

*Don't be afraid- of making mistakes. People often get things wrong. Good language learners don't worry about making mistakes. {#blank#}2{#/blank#},they learn from them.

* Do group activities. People use the language {#blank#}3{#/blank#} (communicate) with others. A good language learner always {#blank#}4{#/blank#} (look) for opportunities to talk with others.

* {#blank#}5{#/blank#}(take) notes every day.Write down just five to ten new words and phrases each day. Review {#blank#}6{#/blank#} (they) from time to time.

* Practice {#blank#}7{#/blank#} (speak) daily. Speak to real people, if possible. 'They can be your teachers or friends. But if you have nobody to speak to, you can watch films and repeat what the actors say.

* Spend some time {#blank#}8{#/blank#} (think) in the language you learn. A good first step is to think in words.Try to name each object around you.Then think in simple sentences. {#blank#}9{#/blank#}example, if you are sitting in a park, you can say, "It's such a beautiful day." Then you can move to think in conversations.Imagine yourself {#blank#}10{#/blank#} (talk) to someone else. You are asking the questions and thinking of replies(回答). The secret to developing a habit of thinking in the language is doing it every day, over and over again.

Many foreigners move to China because of a strong interest in its culture. One man has turned 1 interest into love and this love made him write many books about China. He is William, an American who has lived in China for 33 years, his Chinese name is Pan and he 2 Lao Pan in China.

3 1988, Lao Pan first came to China and worked as a teacher at a university. But Lao Pan did not begin 4 China until he and his family took a 3 month drive around the county. These experiences in China gave him ideas for his books. Since then he 5 thirteen books about China. These books give the world a fuller picture of China and Lao Pan is proud of what he is doing.

Lao Pan's new book 6 his forty seven letters to his family back in America. The letters show China's development in 7 periods. Lao Pan 8 says he loves China so much because of its people. He sees it as 9 life long task to let more westerners know what China is like. He will continue telling the nation's 10 to the world 

A relaxing walk along the Beijing Central Axis （中轴线），from the Drum Tower to the Palace Museum ﹣this was Zhao Xianghan's first citywalk in 2022. Since then，Zhao has been crazy about the citywalk and believes it is the best way to lear about a city. 

"I visited Beijing before the start of my college life here，but I went there with a guide group. Taking photos of places of interest was a big thing. The crowded places made me think that Beijing was noisy，" said Zhao. "Yet now a citywalk allows me to see a whole different side of Beijing，"Zhao added. 

Zhao travelled in Wuhan and Hangzhou last month through citywalk tours. "Citywalk is all about doing whatever you want in your own traveling. And I enjoyed it so much，" said Zhao. 

People like Zhao also share their citywalk experience on the Internet. On the video﹣sharing app Douyin，a video about citywalk route （路线） by Chen Dong in Guangzhou got more than 171

Zhang Xinyu，a 19﹣year﹣old girl from Beijing University，shared a citywalk route from Wukang Road to Fuxing Park in Shanghni. "I like the route because I can know more about the culture and beauty of Shanghai