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• file:science-3.pdf
• file:Social studies-4.pdf
• file:【059】29Our Resources.mp4
• file:【058】28City,Town,and Suburb.mp4
• file:【057】27Visiting the Market.mp4
• file:【056】26From Factory to You.mp4
• file:【055】25Jobs.mp4
• file:【054】24The Beginning of the United States.mp4
• file:【053】23People Start Coming to America.mp4
• file:【052】22Changes in Transportation.mp4
• file:【050】20The Pledge of Allegiance.mp4
• file:【049】19The United States Government.mp4
• file:【029】Motion.mp4
• file:【028】Electricity.mp4
• file:【022】Clouds and Rain.mp4