6. Their article **having been published** in a foreign journal, they became popular in their country.

7. The evidence **found** is essential for further studies.

8. We knew nothing of the mistake and expected **them** to inform us.

9. The car **was broken** when it was delivered here.

10. The conference at the University is said **to have attracted** a lot of participants.

11. **Having given** the signal, everybody rushed to the centre.

12. The instrument **developed** by the scientist now must not be very expensive.