问题补充:
exciting sport it is to climb the mountains!
A. How
B. How an
C. What a
D. What an
答案:
A. How
B. How an
C. What a
(答案→)D. What an
解析:以what引导的感叹句的基本句型结构为what a/an +adj+可数名词单数+主语+谓语!;what+adj+可数名词的复数/不可数名词+主语+谓语!以how引导的感叹句的基本句型结构为how+adj/adv+主语+谓语!