Changed each sentence into a question using the question worlds in brackets: 1.The girl with a shawl on her head is a member of the Thai (who). The Khmer have three main festivals in a year (how many)

Changed each sentence into a question using the question worlds in brackets:
1.The grirl with a shawl on her head is a member of the Thai(who)
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2.The Khmer have three main festivals in a year(how many)
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3.Odu is the smallest ethnic group in Vietnam.(which)
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4.Ok Om Bok Festival is the biggest festival or Khmer people(what)
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5.We can find terraced fields in the northen mountainous regions(where)
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6.Bom Bo village is about 200 kilometres from Ho Chi Minh city(how far)
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7.They built their houses on stilts to prevent floooding from tides of storms(why)
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8.The population of the Tay ethnic group is about 1.7 millions(what)
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9.The Tay have lived in Vietnam for thousands of years(how long)
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10.The M'nong mainly live in Dak Lak province(where)
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