Sharks (鲨鱼) are the most frightening animals in the sea. Sometimes we can see sharks swimming in the sea around Hong Kong. People put nets around some beaches to protect swimmers. When there is a "shark's flag", people must stay on the beach. It will be too late if a shark can swim sixty kilometers an hour to you.

    There are 30 kinds of sharks and 25 kinds of them are dangerous. The whale sharks are very big. They can grow to 18 meters long, but they are not dangerous to people. The jaws (大白鲨) and the tiger sharks are the most dangerous kinds of sharks.

    Do you know all sharks must keep swimming, or they will go down? All sharks can feel everything that happens around them. We must keep calm and don't make any noise when a shark is swimming near you.

    If a shark loses a tooth, a new one will grow out very quickly. So sharks always have many sharp teeth.

    Today there are robots working in factories. Some can help to build cars, and they do easy jobs over and over again. Few people will do such jobs in the future because they are boring, but robots will never get bored.

    Scientists are now trying to make robots look like people. Some robots in Japan can walk and dance. However, some scientists believe that it will be difficult to make them really think like people. For example, scientist James White thinks that robots will never be able to wake up and know where they are. But many scientists don't think so. They think that robots will even be able to talk in 25 to 50 years.

    Some scientists believe that there will be more robots in the future. These new robots will look very different. Some will look like people, and others might look like animals. In India, for example, scientists made robots that look like snakes. When buildings fall down with people inside, these snake robots can help look for people under the buildings. This was not possible 20 years ago, but computers and rockets also seemed impossible 100 years ago. We never know what will happen in the future!

Millie打算向美国的学生介绍自己的国家，根据表格里的要点，写一篇文章介绍中国。

注意： 1. 不得出现自己的学校和真实姓名。2. 必须包含所提示的内容，可以适当发挥。3. 词数：90词左右。

You may have a house robot that can do housework for you. But is it so smart?Met Laura,a robot in the National Library in Madrid. Spain,copying out the old books and writings in its collection. See Aurora,a headless dog-sized robot used to keep birds and other animals away at an Alaskan airport. Watch another 1. 8 meter-tall legless robot called EveR6,waving its arms to guide musicians through a performance. 

Those robots above require artificial intelligence(AD)（人工智能）. AI is a computer system（系统）that can understand languages,make decisions and solve problems. AI can be taught skills using a process called machine learning. Humans give AI information such as books,photos or videos to train it. The more information it studies, the better it can do its job. 

_________ For example, when you watch TV,Al is watching you. It'll know what your favorite is and suggest similar ones. In hospitals,AI is very good at suggesting treatments and can even invent new medicines. To cut down food waste,some schools introduce online systems for the students to choose meals ahead of time. In cities, AI is used to watch out for cars that make black smoke. It works together with the police and transportation teams to stop them and keep the air clean. Al can help us fight climate（气候）change by finding clever ways to reduce energy use. 

Some people worry that AI will take away a large number of jobs and also fear that AI could develop out of our control and bring danger to humans. However,AI is expected to be a more powerful production tool that will help humans achieve more in less time. It is believed that the flying car will be made to offer an easier way out of the morning traffic jam（交通堵塞）. Humans imagine AI might even use a way to solve the problems of our energy needs completely. Anyway,there is still long journey for humans and AI.

Some people have sensitive (敏感的) feet or skin. Others may have a hard time laughing at their own mistakes. Perhaps you live with someone like this. But can you imagine living with a sensitive plant?

 Now, imagine that your hand is a green plant stem(茎) and each of your fingers is a leaf. Use your other hand to touch your leaf fingers. One at a time, close each leaf finger. until you have made a fist. Quickly drop your hand down to your leg. Wait a little while, and then slowly bring your hand back to its original(原来的) position.

 It's just this kind of behavior that has made the sensitive plant get its name. Brush your fingers gently across the leaves of the sensitive plant, and the leaves at once fold up(合拢) like tiny green fingers. The stems drop down as if ready to fall off the plant. About ten minutes later, the leaves open again, and the stems rise again! Sensitive plants are easy to grow inside your house. They simply need to get plenty of water and sunlight. But touching the plant too often can cause the plant to lose its leaves. A sensitive plant that loses many of its leaves may become unhealthy.

 Imagine the fun you can have: introducing a friend to your plant! Have your friend stand close to the plant to tell it jokes. Touch your plant with a finger, and watch your friend's reaction when the plant seems to drop down slowly to say"no". Be sure to tell your friend the true cause of the plant's behavior later, though. You don't want your friend to become overly sensitive about his jokes!

Hello, everyone. We are students from China. We {#blank#}1{#/blank#} colors. Here I'd like to give you some {#blank#}2{#/blank#} about colors. We Chinese like red best,{#blank#}3{#/blank#} it means good luck in China. Blue means freedom and imagination(想象力). It can {#blank#}4{#/blank#} us calm. Green means life and growth. It is {#blank#}5{#/blank#} to see the plants come back to life after a long winter. Sitting around the plants is like sitting in the nature. It makes us feel fresh.