What, How, /; the, a, an______a nice little girl she is! I have

What, How, /; the, a, an
______a nice little girl she is! I have never see such ______nice girl.
【正确答案】：What/a
【题目解析】：此为what引导的感叹句，句型为“What + a/an + 形容词+可数名词单数+主语+谓语！”。