The ocean can be a great place to swim and play, it may also be useful in another way. Some scientists think that waves could help make electricity.
   “Have you ever been on a surfboard or boat and felt yourself being lifted up by a wave?” asked Jamie Taylor of the Wave Energy Group in Scotland. “There is certainly a lot of energy in waves.”
   Scientists are working on using that energy to make electricity. The United States and a few other countries have started doing research on wave energy, and it is already being used in Scotland.
   Most waves are created when winds blow across the ocean. “The winds start out by making little ripples (波纹) in the water, but if they keep on blowing, those ripples get bigger and bigger and turn into waves,” Taylor said. “Waves are one of nature's ways of picking up energy and then sending it off on a journey.”
   When waves come towards the coast, people can set up dams(大坝) to block the water and send it through a large wheel called a turbine(涡轮). The turbine can then power an electrical generator(发电机).
   We will never run out of wave power. Besides, wave energy does not create the same pollution as oil and coal do.
   Oceans cover three quarters of the earth's surface. That would make wave power seem perfect for creating energy around the world. But there are some disadvantages that need us to pay more attention to.
   Jamie Taylor said that wave power still cost too much money. He said that its influence on animals in the sea is still unknown. Besides, wave power would get in the way of fishing and boat traffic.
   With more research, “Many of these problems might be solved,” Taylor said. “Finding more energy sources(资源) is very important, for traditional sources of energy like oil and gas may run out some day.”
   In the future, when you turn on a light button, an ocean wave could be providing the electricity!

The Smallest Life Around Us

    Tiny plants and animals live all around us．We cannot see them because they are so small，but they are everywhere. They live in the soil，in the air，and in rivers and oceans．They grow on mountains and in caves．Some live in the ice at the north and south poles; some live where it is very hot．They are found throughout cities and in the country. They grow on other plants and animals．Some are even living on you，on your skin，hair，and inside your body，in your mouth，nose，and all through your body．

    These tiny plants and animals are called microbes．The word microbe is made from two other words：micro，meaning small，and bios，meaning life．So，microbe means small life．

    Microbes have been on earth for a very long time．They may have been the first forms of life to be alive．Today there are more microbes in the world than all other living things．

    People did not know microbes had existed（存在） long．They were too small for them to see．But people did see many changes in their world﹣important changes．And they did not know what caused them．They saw food that they kept too long change color and begin to smell bad．They saw cuts and wounds grow red and painful and become worse. They saw old plants and leaves and trees crumble apart on the forest floor and disappear into the soil．Such changes were a natural part of the world，but people did not understand them．They did not know these changes were evidence(证据) of tiny plants and animals growing all around them.

    Many wild animals, such as pandas, are in d{#blank#}1{#/blank#}. Often there is not e{#blank#}2{#/blank#} land or forests, so the animals do not have a safe place to live.

    There are only about 1,600 pandas in the wild today. Pandas do not have many babies, and baby pandas often d{#blank#}3{#/blank#}. The situation is getting more and more difficult. We need to p{#blank#}4{#/blank#} them.

    The government is s{#blank#}5{#/blank#} up nature parks and the pandas live in peace there.

Do you like listening to mom？You may say no. Lately，scientists know the reason for it. They find that kids' brains （大脑） enjoy their mothers' words. But when they get older，they like listening to friends' words. 

A scientist named Danel Abram scan （扫描） students' brains （ages from 7 to 16）. When they listen to mothers' words，their brains are active. Students aged 7-12 years answer mom's words more actively. But starting from ages 13 to 14，students talk more with friends. 

Why is this？First，when we grow up，we have more time to study and play with friends，so we think what other people think is more important. Second，this is a time when we think and see the world in our own eyes. 

Next time，when your parents feel sad about this，you can share your feelings and tell them reasons. Anyway，we are sure to grow up and say goodbye to our yesterday's life. 

Open a food delivery(递送) app, place your order, and wait for your food to be delivered to your home— this is how people wait in China these days. According to the latest report, there are about 842 million (百万) Internet users in China and half of them use online food delivery services. 

{#blank#}1{#/blank#}A recent report showed that 86.3 percent of the services' users are young people, between 20 and 34 years old.

Most of these people come from small families that are usually busy with work. {#blank#}2{#/blank#}After all, ordering food online has made life easier and waiting for food at home is much more comfortable. Besides breakfast, lunch and dinner, extra meals such as afternoon tea and midnight snacks can also be ordered online. {#blank#}3{#/blank#}

To win more users, the food delivery companies(公司) are now trying to improve (提高) their services. {#blank#}4{#/blank#}But in 2021, it just took 20 minutes. And what's more, delivery companies can deliver food and many daily things,such as medicine and flowers. {#blank#}5{#/blank#}Meituan Waimai was the No. 1 among all food delivery companies. There were about 3 million delivery staff at Meituan at the end of June, 2022. More than 600 million users order food by using Meituan Waimai.

You must know the story of Snow White and the Seven Dwarfs, but do you know the names of the seven dwarfs?

Doc looks the oldest and is always thought as the head of the group. He wears glasses and always thinks up good ideas. 

{#blank#}1{#/blank#} always looks tired. He has the longest beard (胡须) and doesn't talk much. 

{#blank#}2{#/blank#} has the biggest nose and he gets unhappy with others easily as his name says. He dislikes Snow White. But he is the first to save her from danger. 

 {#blank#}3{#/blank#} is the fattest. He laughs a lot and always looks on the good side of things. 

{#blank#}4{#/blank#} looks the youngest and has no bear d at all. He doesn't speak, but he is funny and everyone loves him. 

Bashful is a shy but kind friend. He often covers (盖) his mouth with his hands when Snow White is around.

Sneezy has an allergy (过敏) to flowers, so he's always sneezing (打喷嚏). He is hard- working and always there for his friends. 

Which dwarf do you like best? Why? {#blank#}5{#/blank#}