Find the mistake.

She asked why did they held the ceremony every year.

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Does the Yao have a rich _______ of folk literature and art?

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The film festival takes place in a August of every year in the country.

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The Mường are _______ ethnic group that live mainly in northern Vietnam.

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The typical house type of the ethnic minority peoples is the _______ house.

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The new drug has great _______ for the treatment of this disease.

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I asked how the Khmer celebrate their New Year.

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The items on _______ in the Museum of Ethnology are very interesting.