VII/
31. with
32. from
33. went
34. are
35. ate
36. field
37. left
38. hometown
39. lot
40. more
VIII/
1. Where can I go to buy beef?
2. Who does Lan go to school with?
3. When did they go to the zoo?
4. How much beef would you like?
5. How long has she learnt Math?
IX/
1. You'd better not eat too much meat
2. How long has Mrs. Mai worked in this factory?
3. What is the chicken's weight?
4. Because Lan was sick, she didn't go to school yesterday.
5. The stomachache prevented Mr. Jone from enjoying the meal.