Passive Voice - Active OR Passive? (ALL TENSES)

 

1) This problem (discuss) at the last meeting.

2) The man admitted stealing the money while he (interview) by the police.

3) When I got back to the car park, my car wasn't there. It (steal).

4) By the time I arrived at the concert hall, there were no tickets left. They (sell).

5) The first pyramids of Egypt (build) around 3000 BC.

6) A: Why are you putting on those old clothes? B: I __________ (paint) the kitchen.

7) When I found my wallet I (discover) that somebody (take) the credit cards out of it.

8) The police (look) for two men who (see) getting into a black car near the bank at about one o?clock last night.

9) The young son of a rich businessman (kidnap) by three men yesterday while he (play) in the park.

10) The prisoners (be) in the kitchen when the fire began.