If you visit the animal shelter in Salinas, California, you'll see huge wood cutouts(剪下的图形) of a dog and a cat. These signs were placed in front of the building to catch people's attention. The supersized cut outs make people curious and encourage them to visit the shelter— and maybe even adopt(收养) a pet. Each year, the Salinas shelter takes in around 2,000 dogs and 2,000 cats. The animals are either strays or are dropped off by people who couldn't take care of them. Of the 4,000 animals, some of them are finally adopted into new homes. Some animals are moved to other shelters. And, unluckily, some cannot be saved because they are too sick or are considered dangerous.   

   Animal shelters provide food, medicine, and a safe place for animals to sleep. But they are not ideal homes. The shelters are loud, and the animals stay in small cages. The people who work at shelters do their best to care for the animals, but the animals do not always get the attention or exercise they need.  

   To prevent so many animals from becoming homeless, pet owners should take care of their pets. One of the best ways to care for pets is to spray or neuter them. This surgery prevents cats and dogs from having more babies. And that reduces the number of homeless animals that end up in shelters.

    The sea looks very beautiful when the sun 1 on it. It can be very terrible when there is a 2 wind.

    The sea is very 3. It covers three quarters(3/4) of the earth. The sea is also very 4 in some places. There is one place, the sea is about 11 kilometers deep there. 5 mountain in the world is about 9 kilometers high. If that mountain was 6 the sea at that place, there would be still 2 kilometers of water 7 it!

    In most parts of the sea, there are 8 fishes and plants. Some live near the top of the sea. Others live deep down. There are also a lot of small living things. Lots of fishes live by 9 them.

    The sea can be very 10. When people go down, the sea becomes colder and colder. Only some men can go down into the deep sea. But, in 1970, five women scientists lived in the deep sea for fourteen days.

    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."

    Many people thought a computer wasn't supposed to be able to beat a top master at the ancient Chinese game, Weiqi, for at least another 10 years. But AlphaGo, an artificially intelligent system (人工智能系统) designed by Google, made it. It easily beat Lee Sedol last year, one of the best players in the world. It challenged the world's top players to show how much progress it had made over the past few years.

    In late May, 2017, AlphaGo appeared in China and played against 19-year-old Ke Jie in Wuzhen, China. He is No. 1 player now in the world. However, the result wasn't out of people's expectation. He lost the match. Though Ke Jie tried his best and he once saw the victory just a step away, he lost his best chance when he became excited.

    At the press conference (新闻发布会) after the match, Ke Jie was interviewed by the reporters. He said he had realized how powerful AlphaGo was, and it was getting perfect. When a Chinese reporter asked him in English, the reporter spoke so fast that the interpreter (口译员) couldn't catch him. Ke Jie got kind of angry and told him that it was unnecessary for two Chinese to speak in English. The reporter apologized to him and offered to ask him for a coffee.

    The cat and mouse game is over, but the challenge between man and robots will still go on.

    Would you like to go to the zoo at night? Last month, Shanghai Wild Animal Park opened its night safari(夜间观赏)for the first time. You can see animals in the dark. Some animals enjoy the night—they are nocturnal(夜行的)animals. Who are they?