Указать страдательный залог1. Our conversation was interrupted by a knock at

Указать страдательный залог
1. Our conversation was interrupted by a knock at the door.
2. Such questions are not usually discussed at our meetings.
3. A new library will be opened in this village next month.
4. Are many or few new houses usually built in our city every year ?
5. Do you know that this book was translated into English only two years ago ?
6. Our town is often visited by foreign tourists.