I took my ticket, and marched proudly up the platform, with my cheeses, the people ______ respectfully on either side.
 
【正确答案】 B
【答案解析】 句意为“我拿着车票还有我的奶酪,雄赳赳气昂昂地跨步走向月台。人们似乎很尊敬我,纷纷向两边退去”。主语people与fall back之间是主动关系,所以用现在分词作伴随状语,故选B。