1) The contract was signed by the head of the company. (sign)
2) The famous actor has been interviewed on the radio. (interview)
3) Peter is offered a new job as a sales manager for an international group. (offer)
4) Many historical sites are visited by tourists along a route. (visit)
5) The demonstration against tests on animals will be carried tomorrow. (carry)
6) The project was examoned yesterday. (examine)
7) The Pyramids were built by the ancient Egyptians. (build)
8) Dinner was served by a waiter. (serve)
9) The door was opened with a key. (open)
10) Letters will have been posed by Tuesday. (post)
11) The firm is being reorganized this year. (reorganize)
12) The sportsman has been invited to the national championship. (invite)
13) The State Hermitage was founded in 1764 by Catherine the Great. (found)
14) About 1000 cities of the Maya civilization had been excavated by archeologists by 1980. (excavate)
15) The car has broken down. (break)