(Dat cau trong ngoac )
1.Bom Bo village is about 200 kilometes from Ho Chi Minh (how far )
2.They built their houses on sitilts to prevent flooding from tides or storms( why )
3.The population of the Tay ethnic group is about 1.7 million ( what )
4. The Tay have lived in Vietnam for thousands of years (how long )
