Here are the sentences rewritten in the passive voice:

1. A huge demand for jobs has been created by new industrial zones.
2. The windows were so dirty because they had not been cleaned by anybody.
3. All the windows have not been replaced by us.
4. Ten pages of the report have been typed by Miss Pike so far.
5. Had all the crops been gathered when it started to rain?
6. The meal has been paid for by Mel.
7. The meals had not been made before we arrived.
8. The rules of the game have just been explained by the judge.
9. Everything had been sold by the time we came too late.
10. Do you know who the graffiti on the wall has been sprayed by?