The Muckrakers
【正确答案】：①The Muckrakers refer to a group of American reform-minded journalists.
② They made investigations and exposed various dark sides of the seemingly prosperous society at the turn of 20th century.
③These exposures shocked the people, the middle-class people, to be more specific, into realizing that something must be done to change the situation.
【题目解析】：
参见教材P207。
