The Aborigines (澳洲土著) have lived in Australia for about 60,000 years. They painted pictures inside caves, and these are the rock paintings that have given us so much information about Aboriginal life. For example, some of the paintings that are about 10,000 years old show men with boomerangs. From this we know that the Aborigines started using boomerangs for hunting at that time. Other pictures show kangaroos, so we know that there were kangaroos at that time.

    The Aborigines believed that spirits made people, animals and plants, and that these spirits still live in the earth. For Aborigines, no one can own the earth—the earth belongs to the spirits.
    In 1700, there were many Aboriginal groups with a population of 750,000 all over Australia, and there were probably more than 240 different Aboriginal languages. The groups did not have a leader. Instead, things were decided by the older men in a group. People from different groups often travelled hundreds of miles to meet each other.
    Aboriginal life changed when an English boat arrived in Australia in 1770. Many Aborigines were killed in the wars that they had with the English. More Europeans came, and they started taking land from the Aborigines. The Europeans also brought new illnesses that killed the Aborigines. The result is that today there are only about 300,000 Aborigines in Australia.

    “Cool” is a word with many meanings. Its old meaning is used to express a temperature that is a little bit cold. As the world has changed, the word has had many different meanings. “Cool” can be used to express feelings of interest in almost everything.

    When you see a famous car in the street, maybe you will say. “It's cool.” You May think, “He's so cool,” when you see your favorite football player.

    We all maximize(扩大)the meaning of “cool”. You can use it instead of many words, such as “new” or “surprising”. Here's an interesting story we can use to show the way the word is used. A teacher asked her student to write about the waterfall(瀑布) they had visited. On the student's paper was just the one sentence, “It's so cool.” Maybe he thought it was the best way to show what he saw and felt.

    But the story also shows a scarcity(缺乏)of words. Without “cool”, some people have no words to show the same meaning. So it is quite important to keep some credibility(可信度).Can you think of many other words that make your life as colorful as the word “cool”? I can. And I think they are also very cool.

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.

①A tidy desk helps you find things easily and is good for your study. But how can you keep your desk tidy?

②First, only put things you need on your desk. For old books, you can put them in the bookcase. Get a box for small things you don't need every day, and you can put your pens and pencils in a pencil box.

③Second, don't put food or drinks on your desk, because they can make your desk dirty. Go to the kitchen when you want to eat.

④Third, put important(重要的)things next to you. Then it is easy for you to get them.

⑤Fourth, clean your desk every day. If you do it every day, you can have a new day with a tidy room the next morning.

要求：

1.假设你的名字是Bob，朋友的名字自拟；

2.介绍你好朋友的基本情况、爱好、特长等方面的情况；

3.词数60词左右，开头已经给出，不计入总词数。

My good friend

Hello, everyone! My name is Bob.

Joel Griffin is a famous expert of dinosaurs （恐龙）. An interviewer from The world is getting some information from Mr. Griffin. 

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They lived millions of years ago and their bones （骨头） have turned to stone. They tell us what the world was like millions of years ago. Scientists slowly put together what they discovered. The first dinosaur bones were discovered in 1818. 

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When dinosaurs were alive，the earth was a very different place. The weather was much warmer and the land was covered with forests. There were no animals，such as cows or horses，like the ones we know today. 

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There were thousands of different kinds of dinosaurs. Of course there were some huge dinosaurs. They were the biggest animals that have ever lived. But some were very small. Some dinosaurs had heavy bodies and walked on all four legs. Others walked on two strong back legs and had two short front ones. 

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Some dinosaurs only fed on plants. They were often heavy，slow﹣moving. Many of them spent a lot of time in water. It prevented their enemies from attacking them. Other dinosaurs were meat﹣eaters. They hunted for their food. These dinosaurs were fighters with sharp teeth. 

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Many of the plants that the dinosaurs needed to eat disappeared. Some scientists believe that the weather changed from warm to cold. Some scientists believe that dinosaurs were not able to get used to the changes in the environment. They did not like the cold weather and they could not find enough to eat.