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19. B (After only 50 minutes flying from Ho Chi Minh City, you will set foot on the tropical paradise of Vietnam and the world : Phu Quoc Island)
20. A (A great part of the terrain is filled with beautiful sandy beaches, but there is a mountainous region with 99 peaks, among....)
21. D (Due to Phu Quoc's location in the Gulf of Thailand, its climate....in the year)
22. C (The most famous food of Phu Quoc is fish sauce...interesting black pepper.)
23. A thu hút
24. B (....but this fact might be actuallly positive as it gives the shores a romantic beauty that you can find in nowhere else in the world.)