When the three children arrived at the tunnel, they looked up at the trees above it.

    "What's happening?" Peter said. "Look at the trees. They're moving."

    He was right. The trees were sliding down the hill.

    "It's a landslide," Roberta said. "There has been a lot of rain. The earth is soft. It is moving and bringing the trees with it."

    "They are going to fall on the railway line," Phyllis said. "There'll be an accident if the train hits them. We must stop the next train."

    "How do we do that?" Peter said. "The next train is arriving at 11:29. That's in five minutes. And the train is only about fifteen kilometers away."

    "We can run towards the train and wave to the driver," Phyllis said.

    "He won't think there is anything wrong," Roberta said. "We always wave to him."

    "We need something red to wave,"Peter said."Red is for danger."

    "My skirtis red,"Phyllis said."I'll tear pieces off."

    "Mother will be angry if you do that,"Roberta said."Skirts are expensive."

    "People may die if there is an accident,"Peter said."Skirts aren't important."

    Phyllis tore strips(条)from the bottom of her skirt.

    "We need sticks to tie the strips to,"Peter said.

    The children ran to a nearby tree. With his knife, Peter cut off three thin branches. He tied each of the strips of red skirt to one of the branches.

    "Now we have red flags," he said. "When we wave these, the engine driver will know something is wrong. He will stop the train and ask us what the matter is."

    The children ran through the tunnel and waited at the other side for the train to come. They had to wait for a long time. Peter thought the watch must be wrong, but it was the train that was late. Then, the train arrived. The children waved their flags. Roberta was so excited that she fainted(晕).

    The engine driver saw the red flags and the children. He knew something was wrong. He stopped the train. Peter and Phyllis ran towards the engine. They shouted to the driver that there were trees on the line. The engine driver climbed down from his engine. He hurried to where Roberta was lying on the ground in a faint. He picked her up and carried her to the train and put her in a comfortable carriage.

    It was Mother's Day. But the young mother was a little unhappy. Because she was 800 miles away from her parents. In the morning she phoned her mother to wish her a happy Mother's Day. and her mother told her about the beautiful lilacs(丁香)in the garden.

    Later that day. When she told her husband about the lilacs. He said. "I know where we can find all that you want. Get the children and come on. "So they went. Driving down the country roads.

    There on a small hill. They saw a lot of beautiful purple lilacs. The young woman ran quickly to enjoy the flowers. Carefully. She picked a few here and a few there. On their way home there was a smile on her face.

    When they were passing a nursing home(养老院). The young woman saw an old granny sitting in a chair. She had no children with her. They stopped the car and the young woman walked to the old woman. Put the flowers in her hands. And smiled at her. The old granny thanked her again and again. She smiled happily. Too.

    When the young mother came back to her car. Her children asked her. "Who is that old granny？Why did you give our flowers to her？"

    "I don't know her." their mother said. "But it's Mother's Day. And she has no children. I have all of you. And I still have my mother. Just think how much those flowers meant to her. "

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. 

There are many kinds of operas in China. It's reported that more than 360 operas are in different places. Here are four major operas in China. 

Every one of us, rich or poor, should at least have one or two good friends. Your friends will listen to you when you speak, will take care of you when you are sick, and will be together with you in your journey through life.

Friendship can make us happier. How can we find a good friend and get on well with each other? Here is some advice.

★Make friends with a person who is easy to get along with.

★Make friends with a person who has something in common with you.

★Believe in each other. This is the most important thing in a friendship.

★Even the best friends may have a quarrel (争吵) sometimes. If this happens, don't let your quarrel last too long. Try to make up with (和好) your friends soon.

Friendship is a kind of treasure in our life. It is like a bottle of wine. The longer it is kept, the better it will be.