1. Nga shouldn't eat much candy in the evening => Nga ought 2.No one will cook dinner for Mary => Mary will 3.It's neccesary to water the trees everyday => You have 4.Does Viet Nam have 54 ethnic groups? =>Are 5.The village is so beautiful =>What 6.Ethnic people often hold festivals IN SPRING(make question:When) => 7.How long have you been an ethnologist? =>When 8.Why do some ethnic peoples build the communal house? =>What 9.The Thai raise cattle and poultry for their own use? =>Are

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