Преобразуйте страдательный залог действительный? 1.Two questions had only been discussed...

Question

Преобразуйте страдательный залог действительный?
1.Two questions had only been discussed when we heard the bell,
2,They got lost because they hadnt been shown the way,
3,This fact has been known about for a long time/

Answer 1

We had discussed only two questions when we heard the bell.

They got lost because no one has shown them the way.

Everybody has known about this fact for a long time.