Charles Dickens' best-depicted characters are child characters: Oliver Twist,Little Nell,David Copperfield and Little Dorrit. (1 分)Those are innocent,virtuous,persecuted,helpless.(1分)The second group of characters are: Fagin,Bill Sikes and Quilp. (1 分)They are horrible and grotesque. (1分)The third group of characters are Mr. Micawber, Sam Weller and Mrs. Gamp.(1分)They are humorous and comical. (1分)