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What makes Chinese traditional music so special? It's the lovely and emotional sound of the instruments, each with (it) own history and meaning.

Pipa, Guzheng, Liuqin and Vertical Flute are among the instruments that have been part of Chinese culture for thousands of years. Pipa is a four-stringed instrument shaped like a pear. It can express various feelings from happiness sadness, with bright and cheerful sounds (create) by fast finger movements. Next is Guzheng, is a 21-stringed instrument with a history of over 2500 years, known for its smooth and gentle sounds. The right hand plucks (弹拨) the strings and the left hand presses them (change) the tone (音调) and make the sound shake. Liuqin is a smaller type of Pipa. With four strings and a sharp, bright sound, it is often used in folk music and opera. Its quick, clear sound adds energy to performances. Then there's Vertical Flute (also called Dizi), a beloved instrument made from bamboo. It has a bright, light sound that (give) the feeling of Chinese folk music. Its sweet, beautiful tones can make listeners feel happy or sad, and its natural sound mixes (perfect) with other instruments in harmony.

Together these instruments are at heart of Chinese traditional music. They tell (story) from the past, express deep emotions and celebrate the beauty of nature. The music from Pipa, Guzheng, Liuqin and Vertical Flute is not only an important part of China's culture, a beautiful way to share the rich history and art of China with the world.

We were seventeen and normally very restless. At first, we could not keep4 and whispered to each other. Was he tired? Upset with us? Just daydreaming? As weeks passed, things slowly5. We stopped whispering. We stopped moving restlessly. Without a word, the whole class fell into a respectful quiet. I thought those minutes were just his way to6 for class.

The7 was much more serious, and I only learned it ten years later at a class reunion. That year, Mr. Davies' wife had been8 a severe, long-term illness. Those silent9 were not for preparing lessons. They were for him to hold together. It was his only personal time to get strong enough to10 us and be the cheerful teacher we expected. He never11 his trouble, and he never let his sadness into the classroom.

In that quiet moment, he taught us a far greater12 than physics. We saw quiet13 and dignity, though we didn't realize it then. Bearing personal14 while doing one's duty takes great inner power. He was more than a physics teacher; he quietly showed us the true meaning of15 and grace.

You may know about the virtual storage space called cloud storage, where you can check, change and store your data. You may also be using a cloud storage service like many other people.

Users are not only able to upload their files easily, but they are also able to access the stored stuff quickly. Since all their data is stored in the cloud, it remains available for use at any moment, ensuring that their information is always at their fingertips.

Data security is another critical advantage. Cloud storage protects you from losing files because of hardware failure. Many times, people face the danger of losing their data stored on computers, laptops or a USB drive. No data is ever erased or lost from this online storage system, unless you delete it.

In addition, cloud storage enables quick data sharing. Cloud offers great convenience to users who may want to share their stored data with others in their work team. Besides, the cloud provides an opportunity to make specific data public. You can also choose exactly who to share your files with, and decide what they can do with them, like viewing or making changes.

Cloud storage is not only a safe and organized way to back up your data, but it also doesn't cost much. On most cloud services, you can get some storage space for free. If you need more space than the free amount, you can pay a little money to get it.

A. Cloud storage is highly accessible.

B. Here are some advantages of cloud storage.

C. This price makes it affordable for most users.

D. This is very important for effective teamwork.

E. However, this is not enough to stop people loving it.

F. However, storing it in the cloud can avoid any such trouble.

G. It also requires a stable internet connection to function well.

At a recent meeting, Yu explained the core problem. Old AI systems, like those for the game Go, learned by analyzing winning strategies in a closed virtual world, while self-driving cars face the open, uncertain real world. Relying only on past data is not enough; the AI needs logical reasoning to deal with unexpected situations. Here, the real-world safety prevent such "learning by failure" on public roads. "That's the main limit," Yu said. "You can't let AI learn from its mistakes where safety is important."

To overcome this, his company is developing "physical AI." This new type of AI doesn't just copy what it sees; it aims to understand the basic rules of the physical world. Their method combines two key ideas: building detailed virtual copies of real-world streets (world models) and letting the AI practice driving in these safe computer environments.

This virtual environment is like a very large "virtual driving school." It can create millions of rare but challenging situations — from busy crossroads to heavy rain — allowing the AI to learn and improve without any real danger. This helps the AI move from simply remembering past data to actively reasoning in new situations.

This technology has been tested in many ways. However, challenges remain, such as creating realistic computer environments and setting clear safety rules. "To help this technology grow well, people need to work together," Yu added.

Thinking about the future, Yu believes this path is important for bringing self-driving technology to everyone. Unlike some who focus on more powerful computers for expensive cars, his team aims to make the technology work better with less, making it cheap for the ordinary market. Their goal is to combine complex driving experience from one region with strong engineering from another to create safer systems for the world.

Because cities are built for humans, they do not always provide suitable homes for wildlife. For example, most city parks are kept neat and tidy so that humans will find them beautiful. But when we cut grass or plant flowers, we destroy natural habitats.

Our actions sometimes help other species. When a bridge in Austin, Texas was repaired, engineers added small gaps along its bottom. This made a good home for bats, and soon the bridge was the home of thousands of bats. At first, people were afraid and tried to get rid of them. Now, they have come to value their winged neighbours. The bats are a tourist attraction, and they eat lots of bugs every night.

There are also structures built to bring wildlife into the city. The Beijing Olympic Forest Park is a good example. The park used native plants and created open, natural spaces for wildlife. The result is a zone in Beijing with over 160 species of birds. In many ways, the park is the converse of a zoo. Instead of being kept in cages, wildlife can move about freely.

Another example is a 2011 plan for a tall "Birdscraper" building in New York. The building would protect birds and fight pollution. It would be in the middle of a lake, birds would sit on it, and their droppings would fall into the water. The droppings would feed water plants, which would then create oxygen through photosynthesis (光合作用).

If we learn to share our space, we can become better neighbours to the wildlife around us. If we do not, more species will become extinct and our future will be endangered.

Our host, Mr. Zhang, served us a bamboo basket of hot jin momo. These are soft buns, just like Chinese baozi. He told us his ancestors brought wheat growing skills from northwest China in the late 1800s. Soon the table was full of special dishes telling silent stories: the cucumber salad carried Gansu flavors and lagman noodles mixed Central Asian vegetables with Shaanxi's hand-pulling techniques.​

People drank tea and talked in different languages. I saw this gathering was more than a meal. The Spanish architect beside me expressed his surprise at how food could keep cultural traditions alive across time and space. The Canadian teacher said Mr. Zhang's kitchen had Chinese knives and Kyrgyz clay pots, which showed our world is globalized.​

This scene made me think of Lisa Kyung Gross' research in New York. She wrote about cooks from other countries. She found food has a special double magic. Spanish bakers give new life to date cookies by dipping them in Belgian chocolate. They add charm and flavors to these traditional foods. As Gross wrote, every bite has many layers of history. But it also keeps open to new ideas.​

This food magic may explain why UNESCO put 38 food traditions on its Intangible Cultural Heritage (非物质文化遗产) list. These include Japanese seasonal cooking and Italian pizza-making skills. These traditions keep cultures alive and help people connect with each other.​

That night at the Dungan home, the Russian engineer laughed as he tried hard to use chopsticks just right. It showed a simple truth: cultural exchange is not about being perfect. It is about our common humanity.

Do you love music and want to help others discover the joy of it? The Music Project offers you volunteer chances to help teenagers develop an interest in music. You can share your love of music with communities and young people around the world.

As a music volunteer, you will help local young people find their musical talent. You will also help them enjoy showing themselves through music. This program is perfect for those who want to help others with music.

What will you do as a music volunteer abroad?

Carnival in Brazil: This project is about Rio Carnival, one of the biggest festivals in the world. Over two million people come to visit it every year. As a volunteer, you will work in a local school to prepare for the festival, create new dances, and help with music shows.

Music in Jordan: On this project, you will help children from poor areas and teach them about social problems through music. You will also lead music workshops to talk about topics like different cultures, gender equality and climate change.

Music in Ecuador: This project is for you if you want to teach music in other countries. You can use your music skills to help local students show themselves by trying new sounds and instruments.

Why join this music project abroad?

As a music volunteer abroad, you will not only help local teachers with music programs, but you can also take a well-recognized online TEFL course (worth $800) at a discount: 20% off before May, 15% before June, and 10% before July. You will also get teaching experience when you plan activities and lessons.

（1）选定的节日；

（2）说明要制作的视频内容；

（3）征求意见。

注意：

（1）写作词数应为80个左右；

（2）请按如下格式在答题卡的相应位置作答。

Dear Peter,

I'm delighted to have the opportunity to introduce Chinese culture to your schoolmates during the upcoming Chinese Culture Week.

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Yours,

Li Hua