单选题 Home to magnates and gangsters, refugees and artists, the city was, in its ______, a metropolis that exhibited all the hues of the human character.
【正确答案】 A
【答案解析】[分析] 习语搭配。 in one's prime全盛时期：This is a dancer in her prime．这是一位处于巅峰状态的舞蹈家。