Раскрыть скобки, поставить глагол в нужный залог и время, 1)my sister(to invite) to the birthday party by her friend yesterday. 2)more and more houses(to build) in our country from year to year. 3)we(to open) the window after every lesson. 4)we(to finish)our experiment in a week. 5)young trees(to plant)in the street last autumn. 6)i(to answer)my brothers letter last week.
2)builds.
3)open.
4)finish(are finishing).
5)plant.
6)answered.