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   Cats are the most popular pets among Americans. So it is not surprising there are many expressions about cats. Do you know any of them? Now let me introduce some to you.
   Some cats like to catch small birds, like canaries. If someone looks very proud or satisfied with himself, we say he looks like the cat that ate the canary.
   Sometimes, a cat likes to play with a small animal it catches. So if you play cat and mouse with someone, you change between different kinds of behavior when dealing with another person. For example, a child might offer something sweet to her little brother, and then take it away when reaches for it.
   A cat will often catch a small animal and present it to its owner. The saying “that looks like something the cat dragged in (把…拖进来)” describes something in bad condition.
   A fat cat is a person with a lot of money.
   There are many other expressions about cats in America. How interesting! Which kind of cat are you, or which kind would you like to be?

    Venus is close to the earth．It is the second planet from the sun．The earth is the third planet from the sun．Venus is similar(相似的)to the earth in size and mass (质量)．It is often described as the earth's"sister"．

Scientists have been learning about Venus for a long time．First they looked at Venus through telescopes(望远镜)．But Venus is covered with thick clouds．Scientists could not see Venus well through the clouds．So they made guesses about it．

For a long time，scientists thought that Venus had water and plants．They thought Venus might have animals too．But they didn't know for sure．

Then scientists found a way to learn more about Venus．In'the 1960s，they began sending probes(航天探测器)to Venus．The probes flew through the thick clouds．They took pictures of Venus up close．They found out many things too．The probes sent the pictures and things they found out back to the scientists．

The scientists learned a lot from the probes．First they learned that most of their guesses were not right．And they learned that Venus is very hot．

After that，scientists knew they could not send people to Venus．But they still wanted to know more about it．So they sent new probes．These new probes took great pictures of the planet．The pictures showed that Venus has plains (平原)and mountains!And in some ways，Venus looks like the earth．

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任务一：简要回答下列问题。

    The world's forests become smaller and smaller. People are still cutting down the trees. Why is this happening? There are two reasons—land and wood. People need land for animals and crops. And people want wood. Japan, Europe and North American need wood. There, it is used for buildings or it is made into furniture.

    But most places from the forests are not good for animals or crops. The soil (土壤) in the forests is very thin. When trees are cut down, the soil is washed away by the rain or the wind. Soon there is nothing but sand. Then more land will be needed and more trees will be cut down.

    Technology is changing our ways of life. Robby Pepper is Italy's first robot gatekeeper. He can answer questions in Italian, English and German. He is placed at a hotel to help answer simple questions from visitors. A guest from Moldova, congratulated the robot on his skills. "He's like a real person. He's really good." She said. "He talked to me, and he shook my hand."

    Japan's Softbank Robotics created Robby. It can provide hotel guests with information they need, like where to find a restaurant and its hours of operation. The use of robots is growing in service industries like tourism. But they are expected to become more useful as better artificial intelligence, or AI, is developed.

    The International Federation of Robotics says about 79,000 professional service robots were sold last year. It expects up to 25 percent sales growth each year. There are many different kinds of artificial intelligence machines: learning robots, cleaning robots, medical robots and public relations robots.

    We have made some progress in the development of AI, but we still have a long way to go. Experts say people in the United States and Japan seem more welcoming to robots than people in Europe do. Shoppers at a store in Scotland got one robot, Softbank's Fabio Pepper, fired out Customers were not willing to talk to the robot. And a security robot in Washington DC made news last year when it rolled itself into a fountain*and could not get out.

    In Brescia, the Cayu car sore is using another Softbank Pepper robot to sell cars Named Cayuiki .the robot is programmed to give information on cars, playing games and collecting information. It is helping to bring in possible car buyers .But the head of the Cayu car store said, "To sell the cars, you still need human beings."