Americans were shocked to discover that the national bird was in danger of disappearing from the skies forever. Studies in 1970 showed only about 1,000, or fewer, bald eagles(秃鹰) in the country.

    The major cause of the problem was people. The spread of civilization(文明) destroyed many of the eagles' feeding and nesting areas. And the eagles were being affected by D-D-T and other insect poisons. The poisons were in the animals the eagles ate. They reduced the eagles' ability(能力) to use calcium(钙). This made the outside of the eagles' eggs very thin. Often, the eggs broke before baby birds were developed.

    In 1972, the U. S. government banned(禁止) D-D-T. People also became interested in protecting places where eagles live. And stronger efforts were made to carry out laws protecting the birds. Scientists began a program that placed baby bald eagles which were born under human care, into nests of wild bald eagles. Often, the wild birds accepted the babies.

    These efforts appear to have been successful in saving the American bald eagles. Today the number of the bald eagles has increased to more than 11, 000.

Everyone knows that exercise is important. We all need to exercise. There are many ways to exercise. You can walk, run, swim, skate, or play ball games, but you should remember to exercise in the right ways.

{#blank#}1{#/blank#} Before you do any exercise, make sure to warm up for at least five minutes. During warming up, you should extend all parts of your body.

{#blank#}2{#/blank#} It's best to exercise twice each week. Thirty minutes each time is enough. Try all kinds of things until you find one, two or even three sports that feel right for yourself.

{#blank#}3{#/blank#} There is a lot of equipment(设备) at fitness centres. The equipment will help exercise your arms, legs and other parts of your body to make you fit. Some people buy equipment for their homes. But it is very expensive.

{#blank#}4{#/blank#} If you get hurt when you are doing exercise, don't play again until you are well.

{#blank#}5{#/blank#} After exercise, it's important to drink something to help you remove your tiredness.

In 2013, Chinese President Xi Jinping offered to build a Silk Road Economic Belt (经济带) and a 21st Century Maritime (海上) Silk Road, which became known as the Belt and Road Initiative (BRI, "一带一路"倡议). The BRI has brought cultures together for over ten years. As the BRI continues to bring the world together, young people from the Belt and Road countries can see how it continues to develop and have a deeper understanding of it. We did a survey of 125 Chinese students. The following survey is about BRI in the eyes of the students. The diagrams (图表) below show the results.

Diagram Ⅰ DiagramⅡ

Diagram Ⅲ Diagram Ⅳ

Hello! My name is Lily. I'm twelve years old. Some of my classmates like sports and some love music. And here is my hobby—cooking. 

I love cooking very much. I can cook nice food. I don't learn to cook in class. I like to learn to cook from videos(视频)on TV. Here is my bread. The first piece is like a strawberry. The second piece is like a banana. My parents say my bread is very good and delicious. 

When I cook new food, I always first ask my parents to eat it. Then I take some to my grandmother. She likes my food very much. I also take some to my friend Gina. 

This term(学期) , there are cooking classes in my school. And the teacher is me!My school knows I can cook very well. There is a big classroom for my cooking classes. All the students like my classes because they think they are fun. I show them that cooking isn't difficult. It's easy. 

Salt has always been important to people.In the past, it was as valuable as gold.Over the years, people discovered different ways to get salt.Some early people got salt from rocks.In other places, people got salt from the sea.They took sea water and put it in the sun.After a long time, the water dried up(耗尽).Then people could get salt.

Today, people still get salt from the sea.But most salt comes from salt mines(矿) and salt wells(井).How do people get salt from salt mines? They dig deep into the ground for it.To get salt from salt wells, people put two pipes(管子) into the ground.Water is sent down through one of the pipes.And the water is mixed with the salt in salt wells.It makes salt water.Then the salt water is pushed up through the other pipe.Later, the salt is taken out of the salt water.

People once worked hard to find and make salt.Now, people can buy it at any food store.