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Unit 6 When was it invented? To learn to understand and use the passive voice. To listen and speak about the history of inventions using passive voice. To listen and speak about what inventions were used using passive voice. Do you know what these inventions are? Karl Benz Do you know who these inventors are? Alexander Bell J. L. Baird Can you match the inventions with the right inventors? Karl Benz invented the first car in 1885. The first car