There is a popular belief that goldfish only have a three-second memory. But a 15-year-old schoolboy from Adelaide has just finished an experiment to tell us that it is not true. He shows everybody that the goldfish is smarter than we think.

    "I don't believe that they had a three-second memory because animals need their memory, so they build up over time a knowledge of where the food is," said Rory Stokes, a student at the Australian Science and Mathematics School.

    He did the experiment in a small tank(鱼缸)of goldfish. "I decided to get a bit of red Logo and just feed them next to that. Every day I'd put it in and spread food around it." He said.

    "At first they were a bit scared of it, but by the end of the three weeks, they were actually almost coming before I put the food in."

    After leaving the fish alone for a week, Rory placed the red Logo block in the tank again.

    "They remembered perfectly well," he said.

    "They actually had a time faster than the average(平均)of the three feeds before I left."

    The goldfish showed that they not only could store information, but also had the ability to get it back at a later date.

    Culum Brown, a researcher at Sydney′s Macquarie University, has studied fish behavior for more than ten years.

    He says his studies of Australian native fish show fish are smart animals that know how to avoid enemies and catch food like any other animal.

    "The thing that I really liked about Rory′s experiment is that he not only got that classical conditioning going but the fact that he could get thorn next just to that specific coloured marker. I thought it was really good." He said.

Better hygiene (卫生) habits can help you stay healthy

According to the World Health Organization, 60 percent of people's health problems are related(与…相关) to everyday hygiene habits. As the COVID-19 spreads across the world, governments and organizations in many countries have suggested that people should pay more attention to their daily hygiene practices.

In China, for example, people usually share dishes together at the dining table. But this habit has a high risk of spreading diseases through saliva(唾液). To fight against COVID-19, many cities in China, including Beijing, Shanghai and Guangzhou, have called on people to order separate(分开的)meals or use serving chopsticks(公筷) to take their food. Many people also suggest that Chinese should continue these habits after the outbreak.

In the US, the Centers for Disease Control and Prevention has asked people to develop healthy hygiene habits. For example, people should cover their mouth and nose with a tissue when they cough or sneeze.

    According to a survey by YouGov, a British market research company, many Americans have taken action to change their daily habits in the face of COVID-19.

After a relaxing weekend, children have to go back to school on Mondays. For parents, they should do something helpful (有帮助的) to let their children get to school on time.

Let children take a good shower. It's good for children to take a shower before they go to bed. It can not only help them sleep well but also save time next morning.

Ask children to go to bed early. School starts at 8：00 a.m. So please let your children go to bed before 9：30 p.m. Your children should (应该) sleep for about nine hours every day. This is quite important because they have to get up early next day.

Make a good breakfast for children. Breakfast can help children study better (更好的) in the day. It can help students listen to teachers carefully (细致地) and think well in class. Also, it's good for their health.

Getting to school on time is very important for your children. So please help them. If you can do the things above (以上), they will study and live happily.

Vienna is a beautiful old city on the River Danube in the center of Europe. It's the capital city of Austria and the center of European classical music. In the eighteenth century a lot of musicians came to study and work in Vienna.

In the Strauss family, there were two composers (作曲家) called Johann Strauss: the father and the son. The father, Johann Strauss the elder, wrote and played music for traditional dances, called the waltz. His dance music made him famous all over Europe. The son, Johann Strauss the younger, was also very successful and popular. He wrote over 150 waltzes. In 1867 he wrote The Blue Danube waltz.

Mozart was another very important composer. He was born in Austria in 1756. Before he was six, he played not only the piano but also the violin. His family took him around Europe and he gave concerts in many cities. He wrote hundreds of pieces of music. But he became very poor and died in 1791 when he was only thirty-five. Like Johann Strauss, father and son, he was a great European musician, and many people still think his music is perfect.

Every living thing needs to reproduce（繁殖）. Reproducing means creating more members of your group. In order for plants to reproduce, they have to spread their seeds（种子）to other areas. Plants have developed all kinds of ways to do this.

The simplest way is gravity（重力）. Many seeds are inside of fruit. When fruit gets too heavy, it falls from a tree to the ground. Sometimes animals will pick up the fruit and drop it in another area. That helps move the seed even farther away. Apples spread this way.

Other plants use wind to spread their seeds. Dandelions（蒲公英）are a good example of this. Dandelion seeds are so light that when wind blows, it carries dandelion seeds to new places. Maple（枫树）seeds also use wind. Their seeds are connected with long, thin leaves that look like wings. When the seed falls from the tree, its "wings" help it fly farther from the tree.

Some animals help plants spread their seeds. The animals eat the seeds. While the seed is in the animal's body, it stays whole. When the seed leaves the animal, it's in a new place.

Ants also help spread seeds. Some seeds have a special smell that appeals to ants. The ants bring the seeds back to their home, which of course is underground. They only eat part of the seed. They leave the rest of the seed underground. After that, the seed can start growing.

Last Friday morning, we had a Chinese lesson. Our teacher asked us a question, "Who is the best {#blank#}1{#/blank#} in Chinese history?" Many students said Confucius.

 Confucius was born over 2,000 years ago. His father died (死) when he was only 3 and he had to work to {#blank#}2{#/blank#} his mother. Young Confucius studied very hard. He visited many famous teachers to get {#blank#}3{#/blank#} . When he was thirty, he became a teacher. He taught about 3,000 students, {#blank#}4{#/blank#} Chinese people say he was a great thinker(思想家). And many of his students were great thinkers, {#blank#}5{#/blank#} .

 Now people still {#blank#}6{#/blank#} him and love him after so many years. Why? Because his ideas help {#blank#}7{#/blank#} in our everyday life. His most important ideas are to be kind to others.

 Confucius said young people should be，{#blank#}8{#/blank#} to the old people. Brothers and sisters should love each other. If someone makes mistakes, we should{#blank#}9{#/blank#} them out. The ideas are always famous {#blank#}10{#/blank#} China. People in many other places welcome them too. They think his ideas make the world a better place. We should learn from the great thinker.

 That's really an important lesson!