Change the following sentences into passive voice
1. Mary didn’t do her homework, did she?
2. For a long time, people believe that the earth is flat
3. His mother says he will come back
4. Is he waiting for her?
5. Who wrote “Gone With The Wind” ?
6. Who is opening the doors?
7. My brothers found the keys, didn’t he?
8. You saw the cat, didn’t you?
9. He told me that my dog was in his house
10. The girl who gave you this present is very beautiful.
11. He suggested allowing council tenants to buy their house.
12. We can not change the articles which customers have bought during the sale