1) a) Nobody knows when this fact was discovered.
b) Christopher Columbus disocvered America in 1492.
2) a) 'Battle of the Books' was written by him too.
b) Jonathan Swift wrote 'Gulliver's Travels' in the eighteenth century.
c) Who built the Tretyakov Gallery in Moscow?
3) a) A lot of strange animals were painted on the wall. We couldn't see all of them.
b) Mr Woodriff painted very good portraits when he was younger.
4) a) Mrs Pitkin didn't show me her garden when I came to visit her.
b) The small island is not shown on the map.
5) a) It was built to make the telephone and television system of the British capital better.
b) The Post Office Tower in London was built in 1964.
2) Long before the construction of modern cars the passengers had been carrying (past perf cont) their baggage on the roof.
3) By next week they will have been testing (fut perf cont) this locomotive for three months. 1) Мы уже давно производим наши локомотивы в Европе, вот почему мы имеем большой опыт и можем продолжать наш бизнес.
2) Задолго до создания современных вагонов пассажиры перевозили свой багаж на крыше.
3) К следующей неделе они будут испытывать этот локомотив уже в течение трех месяцев.