—    . Maybe it will arrive at 4 o'clock this afternoon.

—            .

    Robots seem very new to most people. But they have a long history. The first one was made by a Greek inventor. You may have seen robots in some films. The robots in these films are stronger, faster and more clever than people in real life. Most robots are used in factories. They are used to do many dangerous, difficult or boring jobs. Some people can't look after themselves and move around. They need dogs to help them. These dogs are called guide dogs. Scientists are making robot dogs to help them. In the future, robot dogs might take the place of these guide dogs.

    Robots are also used in American hospitals. At one hospital, a robot takes meals from the kitchen to the sick people's rooms,   it never loses its way because it has a map of the hospital in its computer system.

    In the future, robots will work in space. But robots will never take the place of human beings, though they can help us in a lot of different ways.

    Bill and his friends go hiking(徒步旅行)on Sunday. He is afraid(担心的)he will be hungry, so he buys a lot of food and his bag is heavy. They start at nine in the morning and they get to a city five hours later. When they arrive in the city, they're all tired. And then they go to a park. His friends get on a bus, but Bill can't. His bag sticks(卡住)in the door and he has to get off. The bus leaves and he doesn't know where he will meet them. He walks in the street and goes into a restaurant. He asks for a drink. He is so tired that he goes to sleep soon. When he wakes up in the midnight, he can't find any people in the restaurant. The door is closed and he can't go out. He finds a cell phone number and a name on a piece of paper, so he calls Mr Jackson, the owner of the restaurant.

    "Hello," says Bill. "When do you open your restaurant, Mr Jackson?”

    The telephone wakes the man up and he isn't happy. So he says, "Don't ask me about that. I won't let you in.”

    "Oh, no! I want to go out!" Bill says.