IV.Change each sentence Into a question using the question words in brackets.
1. The Khmer have three main festivals in a year.
=> How many main festivals do the Khmer have in a year ?
2. Odu is the smallest ethnic group in Vietnam.
=> Which ethnic group is the smallest in Vietnam?
3. Ok Om Bok Festival is the biggest festival of Khmer people.
=> Which festival of Khmer people is the biggest ?
4. We can find terraced fields in the northern mountainous regions.
=> Where can you find terraced fields ?
5. Bom Bo village is about 200 kilometres from Ho Chi Minh city.
=> How far is it from Ho Chi Minh to Bom Bo village ?
6. They built their houses on stilts because they wanted to prevent flooding from tides or storms.
=> Why did they build their houses on stilts ?
7. The population of the Tay ethnic group is about 1.7 million
=> What is the population of the Tay ethnic group ?
8. The Tay have lived in Vietnam for thousands of years.
=> How long have the Tay lived in Vietnam ?
9. The M’nong mainly live in Dak Lak province.
=> Where do The M'nong mainly live ?
10.The party will start at seven o’clock in the morning.
=> When will the party start ?
11. I’m talking to Mrs. Nga.
=> Who are you talking to?
12. It’s five kilometers from our house to the mountain.
=> How far is it from your house to the mountain ?
13. Her family name is Tran.
=> What's her family name?
14. They live at 83 Son Tay Street.
=> Where do they live ?
16 Viet doesn’t want to go to my house because he has too many assignments.
=> Why doesn't Viet want to go to my house ?
17 Lien’s brother is practicing the guitar now
=> What are Lien's brother practicing now ?
18. My uncle and I go to the tennis club once a week
=> How often do your uncle and you go to the tennis club ?
19. Trung usually borrows his brother’s motorbike.
=> Whose motorbike Trung usually borrow ?