Ответ:
1.Has the work been finished by him yet?
2.The new task has been finished by them.
3.The way was shown to us by a stranger to the station .
4.this mistake hasn’t been done by her before.
5. two Englsih books have been translated by his friend into Russian.
6.Have any telegrams been sent to us by them lately?
7.She said, that she would be warned about it.
8. Is this student being interviewed ?
9.this film has been demonstrated many times by them.
10.Can this question be discussed now?
11.How often is your room painted?