1) I (to tell) just by the secretary that documents for my business trip (to prepare) now, but they (not to be ready) until the manager (to look through) them.
2) A new exhibition centre (to build) in our city lately and the number of people taking part in fairs and exhibitions there (to increase) from day to day.
3) The cars produced at this plant (to export) to different countries.
4) As it was noisy in the room I couldn't understand what (to discuss). Later I found out that recent political events (to speak about).
5) I wondered why all the offers (not accept). The prices seemed quite reasonable because the company (to modify) the model before.