I/
1. Nam said to Phuong if Ha Long Bay in the Northern of Viet Nam.
2. The rice-cooking festival was held in the communal house.
3. It's a fire-making contest.
4, The letter was written by Miss Lien.
5. Nhi said to Nga if she knew My Son.
II/
6. B
7. B
8. A
9. D
10. B
11. B
12. C
13. C.