The author's purpose in this passage is to inform. The author is informing the reader on how Elizabethans would typically store their food. It goes into details of differences between food types and some options for storing food and getting nourishment in summer and winter.
There'll be a wide variety of other vittles as well.
Here are the answers for the exercise
1. have been
2. did she meet
3. has he been
4. went
5. have we owned
6. did she graduate
7. did the children go
8. didn't write
9. drank
10. Has she ever tried
11. have you lived
12. Have you ever been
13. didn't go
14. did you go
15. Have you eaten/ Did you eat (Both is correct)
16. have wanted
17. has had
18. didn't see
19. did you have
20. Has he ever played