Номер 3:
1)was emptied
2)were postmarked
3)were sort
4)was loaded
5)were unloaded
6)were taken
7)were sort
8)were delievered
Номер 4:
1)I was hit by somebody.
2)The bus was stopped by us.
3)My car was stolen by a thief.
4)The prize wasn't won by her.
5)Was the letter sent by him?
6)The telegram was asked for by the neighbour.
7)The lecturer was listened to by everybody with great attention.