填空题 Evolution into a Shopping Event Retailers in the mid-20th century began offering post-Thanksgiving sales to attract shoppers, ____1___ Black Friday as we know it today. The media played a significant role in ____2_____ Black Friday, with ____3____ of early store openings and __4___ shopping scenes becoming annual traditions. Today, Black Friday is a major retail event, with online sales and extended shopping periods like Cyber Monday ____5____ in-store promotions