Put these sentences into the pssive voice

I. put these sentences into the pssive voice.     
1. should they help jane with the sewing ?
2.the mechanic is repairing judy's car.
3.we must do something before it's too late.
4.they make these artificial flowers of silk.
5.did they feed lulu last night?
6.they ate all the food before we got to the party.
7.he has spelt this word wrongly.