[解析]
(1)C.细节理解题.根据文章第一段的句子"Although it's not an official holiday,millions of employers give their employees the day off,and many people use that day to get a jump﹣start on their holiday shopping."可知,在黑色星期五,美国人经常忙着购物.故选C.
(2)B.词义猜测题.根据文章的句子"retailers (零售商) routinely open their doors as early as 4 a.m.and offer special sales and promotions to the shoppers that arrive early."零售商早上4点就开门,给早到的顾客一些特价打折和促销,可知,"lure"是"吸引"的意思.故选B.
(3)D.细节理解题.根据文章第四段的句子"According to this alternative explanation,Black Friday is the day when retailers finally begin to turn a profit for the year."可知,零售商认为黑色星期五可以带给他们更多的钱.故选D.
(4)C.主旨大意题.根据文章内容和第一段的句子"Black Friday is the Friday following Thanksgiving Day in the United States."可知,文章主要给读者介绍黑色星期五.故选C.