Change into the Passive Voice

Change into the Passive Voice .

1.We paint our house every three years .
2.Yeas ago , people you oil lamps instead of alectric lamps.
3.The're building several new school in our town .
4.The boy knew that they were praising him.
5.We have set up a committe to investigate the matter.
6.I noticed that they had not yet taken the wrecked car away.
7.Can we use an Indifinte Article before an uncountable noun ? 
8.Someone must have dropped this watch in his hurry.
9.They promised the worked higher wages .
10.No one has ever asked me that question before .