Passive or Active.

1. When I saw Mary she (to speak) to a person who (not introduce) to me.
2. Why the book (not to bring) yesterday?
3. It was the first time I (to offer) to go on a business trip to India.
4. Mary was speaking on the phone while the coffee (to make)
5. When I entered the hall, Mary (to show) the pictures.
6. I wonder whether this house (to build) in 1700?
7. I am sure this question (to solve) soon.
8. Frankie (not to explain) how to work with that equipment.
9. Jane (to give) the new version of the agreement?
10. Kate (not to see) for a long time. Do you know where she (to be)?
11. Peter went to Kiev when he (to hear) about Han’s wedding.
12. Jane went to office when she (to tell) about Jane’s visit.
13. Mark (not to finish) the repot; although he (to work) on it for 2 days.
14. It’s the first time Jane (to invite) to the international exhibition.
15. Carl came to the office when the dispute about salary reducing (to take place).
16. The conference (to take place) next month?
17. The salary (to give) ? – Not yet. It (to give) in a few days.
18. Alfred (to bring) to the new hotel, (to show) the room and (to ask) to be ready for the evening meeting.
19. Mark (to know) for a few months when he informed about his living the company.
20. Kate (to work) at HGT for 2 weeks when she (to inform) about its bankruptcy.