change in passive voice
3.The boy broke two glasses
4..He invites us to lunch
5.Shubhash shows the visitors the fort
6.He has inspected the offices
7.She has instructured them how to do it
8.Police had interrogated the thieves
9.We have maintained a mess
10.We have repaired a chair
11.They had nominated her
12.He has ousted her from the job

Answer :

3. Two glasses were broken by the boy.4. We are invited to lunch by him.5. The fort is shown to the visitors by Shubhash.6. The offices have been inspected by him.7. They have been instructed how to do it by her.8. The thieves had been interrogated by the police.9. A mess has been maintained by us.10. A chair has been repaired by us.11. She had been nominated by them.12. She has been ousted from the job by him.