1. Many new houses are built in our town every year. 2 . My invitation has been acceptedf with pleasure by them today. 3 . After the results of their work had been published we found out that the device constructed by one of our engineers was used by them . 4 . A new stadium is being built now quite near my house. 5. The experimental laboratory had been built by 1990. 6 . He agreed to take part in the research work after he had found out that it was connected with the improvement of automated control systems. 7 . I have brought you the dictionary. Here it is. 8 . After the dictionaries had been brought we began translating the book. 9. When we rang them up the plan was still being discussed. 10. Lectures which took place at our club were always attended by a lot of people last year. 11. The experiment is being watched by the students now.