In 1998, A British scientist ,Kevin Warwick, put a small microchip(微芯片) in his left arm. He used the microchip to turn on lights, work with his computer, and even start the water for his bath. After only nine days, Warwick took the microchip out of his arm. Nine days isn't a long time, but it was enough to give the world very important information. It's possible（可能）to have a microchip in your body.

Many people think that we'll all have microchips one day. There are all kinds of things that a microchip could do. It could be useful for simple, everyday things. You might not have to carry keys, because you could use your microchip to open the door of your home. You might not need paper money, because you could use your microchip to buy things.

A microchip might be able to do more important things. For example, a microchip could have all of your important health information. If you fell ill suddenly and went to the hospital, doctors could read your microchip and learn all of your health history. 

Many people dislike the idea of microchip in their body. They have a lot of worries. Is it safe? Could a microchip make you sick? People are also worried about personal freedom(自由). This is probably the biggest reason why so many people don't agree(同意) on the idea of the microchips. Do you want other people and government(政府) to have much information or watch you? For most people the answer is "no". Nobody has microchips in their body yet.