Rewrite the sentences in the passive. Give two variants where possible.
1. They paid the actor £30,000 to make the commercial.
2. Will they show us the documents?
3. Who discovered the structure of the DNA?
4. They asked him a lot of questions.
5. They gave this picture to me for my birthday.
6. They sent for the doctor immediately.
7. Who will interview the applicants?
8. He explained to me his plan.
9. He has already announced his resignation to staff members.
10. He answered them nothing.