Completar frases Relative clauses 2Versión en línea Complete the sentences in the fact file about robots with who, which or that. Add (x) to show that the relative pronoun can be omitted. por Florencia Campodónico 1 Complete the sentences in the fact file about robots with who , which or that . Add ( x ) to show that the relative pronoun can be omitted . Robots - the essential facts ! The word robot was first used in 1920 in a play by the Czech writer Karel ? apek , wrote science fiction . It comes from robota , a Czech word means 'hard work' . 2 The first robot you could programme to perform useful tasks was Unimate , was invented by George Devol in 1954 . He sold it to General Motors , an American car company used the robot to lift hot pieces of metal . 3 In the 1990s , robots started exploring dangerous places . A robot called Dante , was controlled by experts in the United States , went inside the Erebus volcano in Antarctica ; and the Sojourner rover , was designed by the National Aeronautics and Space Administration ( NASA ) , went to Mars . 4 The Roomba is the first really successful robotic vacuum cleaner . Its makers have sold over eight million of them . People know hate doing housework just love this machine . 5 In 2012 , a robot was able to move its arms , hands and fingers in exactly the same way as a human became the first robot in space . The 'robonaut' , was developed by NASA , can perform dangerous tasks people can't do .
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