16. upstairs
17. 选第一，看不清，我确定不选don't need
18. look after
19. stalls
20. at
21. to buy
22. buy
23. some
24. What
25. fun
26. How much
27. for
28. a little
29. a lot
30. healthier
31. fit
32. well, doesn't need
33. calorie
34. many
35. prices
36. listened to, carefully, heard
37. much
38. sections
39. or
40. teaching
41. went
42. hearing
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