Срочно пожалуйста!!!!!!

1. Most of the people working at our factory have received comfortable flats in new houses.

2. Having entered the hall, I saw my friends dancing round the fir-tree.

3. Having passed our examinations, we went to a summer camp.

4. We live in the city founded 1,500 years ago.

5. Having booked tickets beforehand, we went to the theatre half an hour before the performance began.

6. The man making the report is our history teacher.

7. Having come home, he switched on the TV set.

8. The decisions adopted at the conference are supported by many scientists.