V.Change these sentences into passive voice:
1.Lan has just finished her homework.
->
2The audience enjoyed the concert very much.
->
3.They will install solar panels on the roof of our house next week.
->
4.Will the plumber check cracks on the water pipes in two days?
->
5.We will use biogas for cooking and heating in the future .
->
6.People won't burn fossi fuel for energy in the future.
->
7.The teacher corrects our exercise at home.
->