31. From the middle of the 20th century, green tea has been planted extensively throughout the South of Vietnam.
- False. The passage states that green tea was planted extensively in the North and Middle of Vietnam.
32. Vietnam's climate is favorable for growth of green tea.
- True. The passage mentions that green tea can be found widely in both plain and highland areas, indicating a suitable climate.
33. Green tea is good for people health.
- True. The passage states that green tea helps improve the body's resistance to infection.
34. Nowadays, some producers have converted this folk beverage into canned drink.
- True. The passage explicitly mentions this development.
35. Green tea is very expensive so only the rich can buy it.
- False. There is no information in the passage suggesting that green tea is expensive.