Change to active to pasive, pasive to active1. Does that company send thousands of books?
2. Mr. Li didn’t drive the truck last night.
3. Have the doors been repaired?
4. The trees at the backyard weren't being cut by Sam.
5. Students of Harvard are preparing for Theatres performance.
6. That company should be bought by Marcs and Jacob.
7. Will you marry me?
8. Had she given the money?
9. Is the grass cut by them on weekdays?
10. David can’t keep the keys, now and forever!​

1. Are thousands of books sent by that company?
2. The truck wasn't driven by Mr. Li last night
3. Has someone repaired the doors?
4. Sam wasn't cutting the trees at the backyard
5. Theatres performance are being prepared by students of Harvard
6. Marcs and Jacob should buy that company
7. Will I be married by you?
8. Had the money been given by her?
9. Do they cut the grass on weekdays?
10. The keys can't be kept by David, now and forever!