The active voice or the pfssive voice? Use the appropriate forms or the verbs and write down the sentences. 1) a)Cristopher

1) a) Cristopher Columbus discovered America in 1492. b) Nobody knows when this fact was discovered. 2) a) The Post Office Tower in London was built in 1964. b) It was built to make the telephone and television systems of the British capital better. c) Who built the Tretyakov Gallery in Moscow? 3) a) The small island was not shown on the map. b) Mrs Pitkin did not show me her garden when I came to visit her. 4) a) Mr Woodriff painted very good portraits when he was younger. b) A lot of strange animals were painted on the wall. We couldn’t see all of them. 5) a) Jonathan Swift wrote \"Gulliver’s Travels\" in the 18th century. b) \"Battle of the Books\" was written by him too.