Jawaban:

2. Ann will be invited by Bill to the party

3. that report is being prepared by Alex

4. customers are served by waitresses and waitress

5. the lesson is going to be explained by the teacher

6. a new idea has been suggested by Shirley

7. a farmer's wagon was being pulled by two horses

8. the book had been returned to the library by Cathy

9. by this time tomorrow, the announcement will have been made by the president

10. that note was not written by me. it was written by Jim

11. that pie was not made by Alice. was it made by Mrs French?

12. is that course taught by prof Jackson? I know it wasn't taught by prof Adam

13. those papers hadn't been signed by Mrs Andrew yet. have them been signed by Mr Andrew?

14. is your house painted by Mr brown?

15. I won't be fooled by his tricks