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What are the two 《most American》holidays?Fill in the gaps the correct prepositions.
Americans have a big party on Independence Day.Some town and cities have parades with music bands and flags ___ the Fourth of July.The atmosphere of the family party,with hot dogs and hamburgers ___ the afternon and the fireworks ___ night makes the Fourth of July a national birthday party.Thanksgiving Day is __ the fourth Thursday __ November.People started to celebrate it __ 1621.__ Thanksgiving all people in the family gather in the house of their parents and eat a large traditional dinner.