Помогииите,пожалуйста:С
a. Change the following sentences from active to passive. Be sure to keep the same tanse with each change.
1/ John wrote that letter/
2/ Fire destroyed that house
3/ The audiens enjoyed the concert very much
4/ Mary took that book from the desk
5/John will deliver that letter/
6/ Mary has finished the report 7/
7/ Mr.Smith will leave the tickets at the box office
8/ The messenger has just left a box of flowers for you