Energy is something that makes things work or causes changes. Light, heat, sound and electricity are forms of energy. Here is an introduction to them.
Light comes from the sun. It also comes from flashlights, candles and streetlights. Light is important because it lets us see things. It can pass through clear objects, such as clear glass or clear plastic. But it cannot pass through objects that are not clear. Sunglasses will stop some light and protect our eyes.  |
Heat comes from many things. The sun makes the earth’s land, water and air warm. （A）We get heat from burning things like wood or coal. Heat is an important energy for us. Heat makes our body and our homes warm in winter. We also use heat to cook.  |
Sound is a kind of energy that you can hear. Sound is made when something vibrates（振动）. When you talk or sing, put your hand on the side of your neck. Then you will feel your neck vibrating. When you hit a drum, the drum and the air around it vibrate. When the vibrating air reaches your ears, you hear the sound. There are loud sounds and soft sounds. When you shout, you make a loud sound. When you speak very quietly, you make a soft sound. All sound has pitch（音高）. A drum is an instrument with a low pitch. A bell is an instrument with a high pitch.  |
Electricity is made by burning fuel（燃料）. Electricity moves through wires into buildings and homes. It gives many things power to work. Electricity makes lamps, computers, fridges, TVs and many machines work. Electricity makes streetlights shine. Electricity can run through water, so never use it near water.  |
2. Translate the underlined sentence（A）into Chinese.
3. Why can people hear the sound of a drum?
4. Ask ONE question about the last paragraph with How, What, Why…
5. What is the main idea of the passage?
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【推荐1】Stonehenge—Can Anyone Explain Why It Is There?
Stonehenge, a rock circle, is not only one of Britain’s most famous historical places but also one of its greatest mysteries. Every year it receives more than 750,000 visitors. People like to go to this place especially in June as they want to see the sun rising on the longest day of the year.
For many years, historians believed Stonehenge was a temple where ancient leaders tried to communicate with the gods. However, historian Paul Stoker thinks this can't be true because Stonehenge was built so many centuries ago. “The leader s arrived in England much later,” he points out.
Another popular idea is that Stonehenge might be a kind of calendar. The large stones were put together in a certain way On midsummer’s morning, the sun shines directly into the center of the stones. Other people believe the stones have a medical purpose. They think the stones can prevent illness and keep people healthy. “As you walk there, you can feel the energy from your feet move up your body,” said one visitor. No one is sure what Stonehenge was used for, but most agree that the position of the stones must be for a special purpose. Some think it might be a burial place or a place to honor ancestors. Others think it was built to celebrate a victory over an enemy.
Stonehenge was built slowly over a long period of time. Most historians believe it must be almost 5,000 years old. One of the greatest mysteries is how it was built because the stones are so big and heavy. In 2001, a group of English volunteers tried to build another Stonehenge, but they couldn’t. “We don’t really know who built Stonehenge,” says Paul Stoker. “And perhaps we might never know, but we do know they must have been hard-working-and great planners!”
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【推荐2】Trees are one of the oldest “citizens”(居民) of our Earth. They keep our air clean, reduce(减少) noise pollution, improve water quality and provide food and building materials. Just like us, trees change a lot as they grow. At 1 to 3 years old, young trees learn how to protect themselves. For example, many trees grow thorns(刺) to warn animals not to go near. Most young trees have large, deep green leaves so that they can catch enough sunlight and change it into their food and energy.
When trees are 4 years old, they begin to grow every rapidly and become strong enough to face challenges later in life. At the age of 15, trees become young adults. They grow more slowly and begin to produce flowers and fruit. It is not until the tree is 20 to 25 years old that it becomes a real adult. The tree reaches its largest size. Not only does the adult tree give us shade, oxygen and natural beauty; it is also a great place for a tree house, or a place for us to nap, read a book, listen to music or sip tea. If the adult tree receives proper care, it will continue to live healthily for many years.
Gradually(渐渐地), trees begin to grow older and older and even die. At this time, they still have their important place in nature. When a tree becomes hollow or part of it becomes dead, it provides a home to small animals and is a source of food for many other animals. In many ways, the life of a tree is similar to our own life experience. When looking at the life of a tree, we learn that each period of life brings its own form of joy and challenge. Enjoy every minute of it and take care of the trees.
1. How do young trees protect themselves?2. Do all young trees have large, deep green leaves?
3. When do trees grow more slowly and begin to produce flowers and fruit?
4. Trees are important in nature when they grow older, aren’t they?
5. What does the writer suggest us do with trees?
【推荐3】What is needed to survive? How do living things interact (相互作用)? Is there food, water, comfortable temperature or shelter (庇护所)? All of the answers to these questions are found in the ecosystem (生态系统). An ecosystem is made up of all living things and non-living things and how they interact with each other. Ecology is the study of how all these things interact with each other in order to survive.
An ecosystem may be very small like a yard or a pool. Or it can be large like a prairie (大草原), a desert or a rainforest. No matter (不管) where they are or how small or large they may be, all ecosystems are made up of the same parts. These parts are either living or non-living parts and are equally (同样地) important to the ecosystems.
We call non-living parts of the ecosystem abiotic factors (非生物因素). All living things need non-living things to survive. Some of these abiotic factors include water, minerals (矿物质), sunlight, air, climate (气候) and soil.
All living things need water to survive. Living organisms (有机物) are made up of between 50 and 95 percent water. The processes (过程) that keep living things alive can only happen in the presence (存在) of water. Living things also need minerals. Some living things need sunlight to make food. Animals need oxygen to produce energy for their bodies.
The environment must also have the right temperature for organisms to survive. Without these non-living things, life would not exist (存在).
Just like abiotic factors make it possible for organisms in an ecosystem to survive, biotic factors are equally important for survival in the ecosystem. Biotic factors or living parts of the ecosystem include animals, plants, fungi(菌类), protists (原生生物), bacteria (细菌) and so on.
根据上面短文内容填空。
1. An ecosystem is a system that is
2. No matter where or what
3. Non- living parts of the ecosystem
4. Water is necessary for all living things. They need minerals, sunlight, oxygen and right temperature to survive
5. The passage is about the
【推荐1】Canada is in the North America. Vancouver (温哥华) is coastal (沿海的) city in it, which is well-known around the world. It is in the west of Canada, on the Pacific Ocean (太平洋). It is one of the most beautiful cities in the world—a city where you can go skiing in the morning, and go sailing (航海) in the afternoon. But over a hundred years ago only a few hundred people lived there. Now there are nearly 1,800,000 people there, and it is Canada’s third largest city. Vancouver had water all around it and has lots of amazing views (风景). It is a city full of colorful flowers and people call it “the village on the edge (边缘) of the forest”! You can go skiing for five months of the year in the high mountains. It takes only thirty minutes to drive from the city to the mountains. Vancouver is famous for its whales (鲸鱼). You can take boat to Vancouver island and watch the whales.
| The Introduction of Vancouver | |
| Location (位置) of Vancouver | In the |
| The number of people in Vancouver | Its population (人口) is nearly 1800 |
| The reason why it is called the village on the edge of the forest | For its amazing views and being |
| The time from the city to the mountains | Only half an |
| Being | Its whales |
In recent years, China's four great new inventions"which have made our life more and more convenient also been changing the world.
Dockless shared bicycles(共享单车)
Presently, there are over 30 bike-sharing companies in China that provide about 10 million bicycles for shared use to people in dozens of Chinese cities. Dockless bikes allow users to simply pick up or park a bike anywhere on the street.GPS, smart phone apps, mobile payment and Internet of Things technology, China's system of docked shared bikes provides the public more convenient service.
High-speed rail(高铁)
China has built the largest high-speed rail (HSR) net work. HSR runs at speeds of 250-350 kilometers per hour. They connect north and south, east and west. They travel to many cities. More than 2500 nigh-speed trains are running in China. They are fast, safe and convenient. China's HSR technology is also used in other countries,like Russia and Turkey.
Alipay
Alipay, or Zhifubao, is China’s leading mobile and online payment service,set up in 2004 by Alibaba Group. Buyers can pay for their goods(货品))by inputing payment passwords or scanning payment code(条形码) on the Alipay app installed on their mobile phones. Besides, users can pay family or personal bills through Alipay, such as water and electricity bills.
Online shopping
With around 731 million Internet users, China has been the world's largest and fast- growing online market It's thought to be cheaper and more convenient. The deliverymen bring goods to your house. There are even many new "online shopping festivals"in China, and the most popular one is called the"Double Eleven. "Foreign customers are also interested in China's internet shopping. They can bury goods from some Chinese shopping websites.
| 81.The place where docked shared bikes can be parked | 81. |
| 82.The speed which HSR runs at | 82. |
| 83.The time when Alipay was invented | 83. |
| 84.The the most popular "online shopping festivals | 84. |
| 85.The number of China's new inventions in the passage | 85. |
【推荐3】Are your parents often argue with you? Or you always disagree with your parents. Maybe the relationships between you and your parents are terrible. It’s difficult to make your home a happy and healthy place. In fact, you can change the situations by the following ways.
Respect (尊重)
It’s important to show your respect and care about your parents’ feelings. Though you have disagreements (分歧), at least try to understand whatever they are trying to tell you. You shouldn’t keep your own thoughts only.
Communication
You can communicate with your parents in a polite way. You may not get what you want, but explaining your thoughts calmly and rationally (理性的) may show your parents that you are no longer a kid, not just a kid.
Trust
How can your parents build trust in you? It depends on what you do. For example, if you get home late without calling first, next time your parents may not believe you. To earn (赢得) their trust, you must pay attention to the ways you do things instead of fighting with them. It will make your life much easier.
Taking time together
Some teens find that sharing time together can build trust and communication. Your parents may be interested in going shopping, hanging out and playing cards with you. Spending time together will drive away the “black cloud” hanging over your home.
Your parents give all their love to you. Why not try these actively to own a happy family as you want?
Complete the chart according to the passage with only one word for each blank.
There are four good | |
Respect Think about your parents’ | Communication Express your thoughts in a |
Trust You must pay attention to the ways you do things instead of fighting all the time to have an | Taking time together You can get a chance to build trust and communication by sharing |
