So dogged were Frances Perkins' investigations of the garment industry, and her lobbying for wage and hour reform was persistent, Alfred E. Smith and Franklin D. Roosevelt recruited Perkins to work within the government, rather than as a social worker.
So dogged were Frances Perkins’ investigations of the garment industry, and her lobbying for wage and hour reform was persistent, Alfred E. Smith and Franklin D. Roosevelt recruited Perkins to work within the government, rather than as a social worker. 划线部分是一个独立主格,不能有was和and,因为so that结构之间不能有逗号,只能把独立主格和两个逗号都拿掉 A. and her lobbying for wage and hour reform was persistent, B. and lobbying for wage and hour reform was persistent, so that C. !her lobbying for wage and hour reform persistent, that D. lobbying for wage and hour reform was so persistent, E. so persistent her lobbying for wage and hour reform, that