Помогите пожалуйста 15. Mashrooms(to gather)in autumn

1. My question (to answer) yesterday.  2. Hokey (to play) in winter.  3. Mushrooms (to gather) in autumn.  4. Many houses (to burn) during the Great Fire of London.  5. His new book (to finish) next year.  6. Flowers (to sell) in shop and in the streets.  7. St. Petersburg (to found) in 1703.  8. Bread (to eat) every day.  9. The letter (to receive) yesterday.  10. Nick (to send) to Moscow next week.  11. I (to ask) at the lesson yesterday.  12. I (to give) library last Friday.  13. Many houses (to build) in our town every year.  14. This work (to do) tomorrow.  15. This text (to translate) at the lesson.  16. These trees (to plant) last autumn.  17. Many interesting games always (to play) at our PT lesson.  18. This bone (to give) to my dog tomorrow.  19. We (to invite) to a consent last Saturday.  20. Lost time newer (to find) again.  21. Rome (not to build) in a day.