“It's just a story,”you may think. But new research has found that crows' brains may sometimes be better than those of 6-year-old children.

In a recent experiment, American scientist Corina Logan and her team caught six crows to test them. The crows and children had to choose between two sets of tubes(试管). They had to drop stones in and get water.

With the red set, when they dropped a stone into a wide tube, the water level raised in a connected narrow tube. The blue set of tubes, however, had no connection between them.

Children aged 7 to 10 were able to learn the rule. Children aged 4-6, however, failed.Five of the six crows failed the test. But Kitty, a 6-month-old crow, passed it. She put most of the stones into the red tubes.

So, could a bird be more clever than a kindergartner? Don't be too quick to say no.

    It was a cold snowy morning after the winter vacation. And it was my first day at my new school. I was walking alone slowly and worrying about lots of things. It was early and there weren't many people on the road. Suddenly a girl who was riding a bike on ice fell down. She was trying hard to get up but fell again. Without thinking, I went over and helped her. She said" thank you" with a smile and then rode away. Her words warmed me a lot.

    Finally, I got to school. The teacher led me to the classroom and introduced me to the class. Then he asked me to sit down beside a girl. I felt so nervous that I didn't dare to look at her. Soon the first class, English, started. Their textbooks were different from those in my old school. As I was wondering what to do, an English book appeared in front of me. "Let's share," the girl beside me said. "Hi, I'm Carrie." I looked up. It was the girl I helped this morning. Later on, we became good friends.

    From that I learned: To help others is actually to help ourselves!

    Leon was a postman. Every day after Leon woke up, he would feed his 37 cats. Leon didn't really want 37 cats, but one by one they had turned up on his doorstep, and Leon had taken them in.

    Every day, after feeding the cats, Leon would collect the mail from the red postboxes in the village and take it home to sort（分类）. “If only I had 37 helpers instead of 37 cats, my job would be so much easier,” Leon thought. Just then, the cats started meowing for their dinner. That gave Leon an idea. That night, Leon stayed up making 37 cat-sized postal backpacks. Each backpack fitted neatly onto a cat's back. Then, he went around to each postbox, putting signs up that read: Postbox closed. Please use the Postal Cat Service.

    The next day, Leon put a backpack on each cat and dropped off the cats around the village. Leon knew that the cats would be happy lazing around all day. He also knew that they would always come home for dinner. Leon spent the day relaxing, waiting for his helpers to return. Leon was right. The cats did return, but they did not bring home many letters. Somehow, the cats had managed to wriggle（蜿蜒而行） out of their backpacks. Or lose their letters. Or get the letters wet. “Cats are just too unreliable（不可靠的）” Leon thought. Just then, there was a scratching（刮擦声） at Leon's door. A dog was waiting to be invited inside. That gave Leon an idea.

    Mrs.White had a lovely young cat，and it was the cats first winter.One evening，it was1 outside when it began to snow.Mrs.White2 everywhere and shouted its.But she couldn't find it.So she3 the police，and said，"I4 a cat.Did anyone find one？""No，Madam" answered the policeman at the other end."I will ring you up if someone finds it.What5 is your cat？""white.""I think it may be in the snow.But don't worry.I know cats are really very6 animals."They sometimes live for a few days in the snow, and they're quite all right" Mrs.White felt7 when she heard this."Yes，yes.I think you are8"She said，"and my cat is very clever.She can almost talk." The policeman was getting tired.He said，"9 don't you put down your telephone？Perhaps she is trying to 10you now.

    Then Alice saw a small glass table. There was a little golden key on it. She picked it and put it in all the locks on the doors but it didn't open any of them. She moved a curtain on one of the walls and discovered another door, a very small one. She put the key in the lock. It was exactly the right size! She opened the door and looked through it. At the end of a low passage she saw a beautiful garden. It was full of brightly coloured flowers and fountains.

    "Oh, how beautiful!" she said. "I'd love to go there but I'm too big to get through the door."

    She walked back to the table. There was a bottle on it now.

    "I'm sure that bottle wasn't there before," she said, a little confused.

    She put down the key and picked up the bottle. She read the words "DRINK ME" on it. Alice wasn't a stupid girl. She didn't drink it immediately. First she looked at the bottle carefully. There wasn't a label on it that said "POISON".

    So she put the bottle to her lips and drank.

    "Mmm, ifs nice," she said. It tasted like cherry tart, pineapple, roast turkey and toast-all the things that she liked to eat-so she drank some more. And some more. Soon the bottle was empty.

    "What a curious feeling," she said. "I'm getting smaller and smaller.'" It was true! She was now as small as her cat Dinah.

    "Good! I can go through the door into the garden," she said. But, poor Alice! When she got to the door, she didn't have the key! It was on the table. She couldn't reach it because she was too small now. She sat down and cried.

    After a while she said, "Alice! Stop crying! Crying doesn't help! Dry your tears immediately!"

    When she looked at the table again, she saw a small glass box under it. She picked it up and opened it. There was a small cake inside. It had the words "EAT ME" on it. She put a small piece of it in her mouth.

    "If I grow bigger I can reach the key," she thought. "And if I grow smaller I can go under the door."

    But nothing happened so she finished it.   

    Do you know the astronaut Chen Dong? He and another astronaut Jing Haipeng stayed in space for more than 30 days from October to November in 2016. During the days, they, did some experiments in space. For example, they tried to plant vegetables there.

    Chen Dong was born in Henan Province in 1978. When he was a child, he wasn't a good student. When he was in Grade 3, he made the vegetables at school dirty for fun. The vegetables were a gift to the teachers from the school, He was very afraid after that. However, his teacher wasn't angry with him. "You have to think about others when you do such things," the teacher only said.

    After that, Chen became a good student. He later became the class monitor, In 1997, he joined the PLA Air Force(中国人民解放军空军). With a safe flight record of 1,500 hours as a pilot, Chen became a member of the Shenzhou-11 mission(任务) in June, 2016.

    Before flying to space, Chen told his twin sons, "Dad is going out. When you look up at the sky and see a shining star, I am probably there, and say hi to me."