摘要：27．In that country.August 31st is a national festival everyone.men and women.old and young.sings and dances happily in the streets. A．where B．when C．that D．as
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. In that country，August 31st is a national festival ________ everyone，men and women，old and young，sings and dances happily in the streets.
A．where B.when C．that D．as
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