You probably don't think about soil often, but the following report may help you learn about science of soil.

What is soil made of?

Soil is made of sediments (沉积物) and humus(腐殖质). Sediment is small pieces of rock broken down over time by rain, ice, and wind. Sediment is often found in water. Humus comes from decayed(腐烂的) plants and animals. It helps give plants a lot of the food they need to grow.

How does soil form?

Over centuries, rock breaks down into very small pieces.

The rock pieces mix with humus.

The humus gets thicker and thicker over time. Soil is formed(形成)l

How are soils different?

Soils can be different colors and have different textures(质感). Texture is how the surface of an object feels. Color and texture are two features(特征) of soil.

Plants and soil

Plants do not grow well in some soils. Sandy soi1 is too dry. It does not hold water. Soil with too much clay is too thick. Most plants grow well in dark, rich garden soil that has different sediments and a lot of humus in it.

A. When you need help for your homework, go to the library. You may find newspapers, and big dictionaries there. They can always help you.

B. For families with children, an important problem is stopping the children from watching TV to do their homework.

C. Even if you could buy the world, you couldn't buy a happy family, good friends, or knowledge.

D. The Lost World is an exciting American film. People, especially school students, may like it.

E. People might grow plants and vegetables in the sea in about 50 years.

①{#blank#}1{#/blank#} "Parents Headache"

②{#blank#}2{#/blank#} "Farms of the Future "

③{#blank#}3{#/blank#} "Study Tools(工具)"

④{#blank#}4{#/blank#} Activities(活动) for Free Time

⑤{#blank#}5{#/blank#} "Money Isn't Everything"

    What do we really mean by being open? Being open is a kind of invitation to others to come in, to speak and to share. It is important to let others get to know what we think and how we feel. In this way we will be understood and accepted by others. If we aren't open with others, we won't fully believe in ourselves or others.

    Here are a few ways for you to be more open. First, make your outside behavior the same with your inside feelings and thoughts. Second, share how you really feel about something instead of just opinions. Third, try to change your questions into statements(陈述句) and talk in the first person so that people will understand you more easily. For example, you might say, "I feel happy that you're here." instead of "Are you glad that you're here?" Finally, try not to say, "I don't know." This usually means I don't want to think about it any more.

    Remember also that it is not suitable to be open with everyone in every situation. You may want to be more open with close friends, but not with people you don't know well, because you are not sure how someone else will use what they know about you. Besides, some people may not be used to too much openness. If we say everything we feel or think to them, they will feel every uncomfortable at times.

    In all, being open is a good way for us to get on well with other people，but we'd better keep the balance between being open and not being too open.

    In ancient Egypt, women did not go out to work. They stayed and worked at home. Many Egyptian men were farmers. Some men were builders or fishermen. Other men worked as artists. Some other important people did not do any farming.

    The weather in Egypt was very hot. Ancient Egyptians did not wear many clothes, Men, women and children often wore simple robes made of thin cloth. On their feet they wore light open shoes. People, including women, shaved(剃) hair from their heads to keep cool.

    Children in ancient Egypt grew up to do the same jobs as their parents. Girls stayed at home with their mothers. They learned to look after the home Boys worked with their fathers. They learned to do the jobs their fathers did. They learned to look after the home Boys worked with their fathers. They learned to do the jobs their fathers did. They only went to school to learn to write if they wanted to become a scribe (抄写员).

    Many of the games played by ancient Egyptians are similar to games we still play today, Children played racing and jumping games. They also played ball games and with wooden toys. Older children played a game like chess.

    The kings of Egypt (the pharaohs) had enough power to master their country. The people thought that the pharaoh was a god. He owned everything. Everyone had to do what he told them to do. The pharaohs built huge tombs. When a pharaoh died, he was buried in the tomb. The tombs were often in the shape of pyramids. When a pharaoh was buried, he was surrounded by treasure and by things to help him in the next world, such as food, clothes, furniture and weapons.

    The Internet is shaping our lives. We already have online shopping services and mobile payment. However, this is just a start. The world's leading tech companies are planning to build smarter online communities. {#blank#}1{#/blank#} It was held in Wuzhen, Zhejiang last year. The development of artificial intelligence(AI,人工智能) was a hot topic at the conference(会议). If a machine can learn and solve problems as humans do, it can be called AI.

    The company Alibaba uses AI technology in its unmanned supermarket in Wuzhen. There is no salesperson in the supermarket, just a tablet on a desk that says "please smile". {#blank#}2{#/blank#} The bigger your smile is, the more discounts(折扣) you will get. Payment is done automatically(自动地) through your Alipay(支付宝)account. When you first enter the supermarket, the supermarket's AI recognizes your face and your account.

    There is also AI that can read lips. {#blank#}3{#/blank#} It recognizes your mouth, s movements and turns them into voices or text messages. This could be very useful when you are trying to talk to someone on your phone in a noisy place. Police could also use the technology to help them find criminal suspects by lip﹣reading recordings from video cameras.

    {#blank#}4{#/blank#} Microsoft's chatbot Xiaolce can not only provide useful information, but also chat with people like a real friend. Xiaolce has a WeChat account. After following the account, users can start talking with her. {#blank#}5{#/blank#} She keeps improving herself by talking with users.

    These technologies are being put into wider use. We may see a smarter world and better lives in the near future.

A. She knows when to comfort you or tell jokes.

B. They discussed this at the World Internet Conference.

C. Sougou brought its lip﹣reading system to the conference.

D. If you smile, it will give you a special discount for your goods.

E. Another type of AI focuses on understanding human emotions.