C.
1. In the south of Viet Nam.
2. Because their jobs depend heavily on the weather.
3. In the afternoon, when the fishing boats come in
4. They sell them at the local market or the town nearby.
D. 
I/
1. How far is it from the centre to the Museum of Ethnology?
2. Which ethnic group has the second largest population in Viet Nam?
3. What are the Yao people famous for?​