A robot is a machine that does work for people. The word ‘robot’ 13 ______ in the 1920s and it was first used in a science fiction story. In real life, the robot was invented later, in 1954. There are different kinds of robots which are used in 14 ______ industries. Most of them are operated with the help of a 15 ______ program. Instead of humans, robots do hard and boring work in unpleasant or dangerous environments. They usually work faster and more 16 ______ than people. They never get 17 ______ and do not make mistakes. Nowadays robots are often used for domestic needs – to clean houses or to look after sick and elderly people. Scientists say that soon robots will 18 ______ a normal part of our life, like mobiles and computers today.