Make the question (Wh-) for the following sentences

Make the question (Wh-) for the following sentences. 
49.The ethnic minorities in Vietnam often live in mountainous areas.
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50.Their costumes are colorful and unique.
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51.They often gather together at the communal house in special ocasinos.
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52.Ethnic people often hold festival in spring.
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53.Life in the mountainous areas is quite difficult because of the extreme weather. 
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