Выпишите предложения, в которых используется passive voice и переведите их на язык. 1. the material was very difficult for our students. 2. several possible solutions will be chosen by the scientists of our department. 3. the delegates were asked if they themselves would select the schools they wanted to visit. 4. this scientific research was carried out many years ago. !

Several possible solutions will be chosen by the scientists of our department.
The delegates were asked if they themselves would select the schools they wanted to visit.
This scientific research was carried out many years ago.

  Несколько возможных решений выберут ученые нашей кафедры.
Делегатам было предложено самим выбирать школы, которые они хотели бы посетить.
Эта научно-исследовательская работа проводилась много лет назад.