Robots seem very new to most people. But they have a long history. The _________ one was made by a Greek inventor(发明家) . You may _________ robots in some films. The robots in these _________ are stronger, faster and cleverer than people. In real life, most robots are used in factories. They are used to do many dangerous, difficult or boring _________. Some people can't look after _________ and robots are used to help them. For example, some people can't see. Many of these people use a _________ to help them move around. This dog is called a guide dog. _________ are making a robot to help them. In the future, robot dogs _________take the place of(代替) these guide dogs.

Robots are also _________ in American hospitals. At one hospital, a robot takes meals __________ 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(系统) .