The world is in danger. At one time there were 1,300 different plants, trees and flowers in Holland, but now only 860 remain(剩余). The others have been destroyed(破坏) by man. We are changing the earth, the air, the water and everything that grows and lives. We can't live without these things. If we continue doing like this, we will destroy ourselves.

    What will happen in the future? Perhaps it is more important to ask "What must we do now?" The people who will be living in the world of tomorrow are the young of today. A lot of them know that conservation(对自然环境的保护) is necessary. Many are helping to save our world. They plant trees and protect animals in forest. In a small town in the United States, a large group of volunteers cleaned the banks of their rivers. Young people may hear about conservation through a record called No One's Going to Change Our World. It was made by the Beatles, Cliff Richard and other singers. The money from it will help to protect wild animals.

    Do you want to visit the North Pole(北极) this summer? {#blank#}1{#/blank#} So if you enjoy the sunshine very much, come to Sunshine Hotel in the North Pole this summer. It's very far from where you live, so you can only come here by plane. It is also very cold here. {#blank#}2{#/blank#} You can play with the snow in the evening because it is still bright (明亮的).

    In Sunshine Hotel, there are 20 floors (楼层) and 100 rooms. {#blank#}3{#/blank#} You have to pay S 100 for a room for one night. Every room has a big balcony(阳台). {#blank#}4{#/blank#} Sometimes you may see some interesting animals. There is a coffee bar (咖啡馆) on each floor. You can get hot coffee here for free. If you want other drinks, you have to pay for them.

    {#blank#}5{#/blank#} Do you want to feel anything different? Welcome here!

    I am a Chinese middle school student. I am 1 . I am in Class Three Grade Seven. I go to school by 2 every day.

    I live in Beijing. There are four people in my 3 . They are my father, my mother, my 4 and I. My father is a manager and my mother is a secretary in 5 office. My sister and I are 6 school.

    There are some 7 in my city. And there are many trees in front of 8 buildings. There is a garden 9 my house. There are many flowers in it. I like them very much. There is a playground near my home. I often 10 football in it.

Doorbells are the bells (铃) for people to ring at a door. When someone hears it, he or she can open the door. Do you know that you can ring a doorbell for fish, too? 

Every spring, millions of fish migrate (洄游) along the river in the city to find better places to lay eggs. But in the river, there are many locks (水闸). They stop fish from swimming through. Weerd Lock is in Utrecht, the fourth largest city in the Netherlands (荷兰). When fish get there, they have to wait a long time before the lock opens for boats to pass through. The lock keeper there is glad to open the lock for fish, but he cannot tell when fish want to get through. So in 2021, Mark van Heukelum, a scientist, came up with a good idea to help solve this problem—by using the fish doorbell. 

Under the water near the lock, there's a camera. People from around the world can visit a website (网站) to see fish through the camera. When you see a group of fish waiting, you can ring the doorbell on the screen. And when the lock keeper notices it, he will open the lock for the fish. 

In its first spring season in 2021, people around the world rang the fish doorbell more than 100,000 times. If you want to join them to help fish, visit the website and ring the fish doorbell next spring.