For humans, walking is usually a very ____ task. But for robots, it's very difficult - especially over ____ ground. Researchers are helping to make robots walk better by giving them machine parts that ____ like human bones and muscles. Walking on four ____ is much simpler. Robot pets have already been developed and are becoming more and more ____. They move, cry, sense your ____, and can learn basic words. But there are no ____ yet that robot pets will replace real ones. Many people feel that robot pets make them feel ____.

Technology: Robots are coming

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