（）interesting it is to go sailing in Qingdao

这题选 C
由what引导的感叹句
　　what修饰名词或名词短语,有以下两种形式：
　　1.What+a(an)+（形容词）+单数可数名词+主语+谓语!如：
　　What an apple this is!
　　What a fine day it is!
　　2.What+(形容词）+可数名词复数或不可数名词+主语+谓语!
　　What kind women they are!
　　What nice music it is!
由How引导的感叹句
　　how用来修饰形容词、副词或动词.其结构是：How+形容词（副词）+主语+谓语!　How hard the worker are working!
　　How clever the girl is!
　　How quickly the boy is writing!
　　注意：当how修饰动词时,动词不跟着感叹词提到主语之前.
　　How the runner runs!
　　what与how引导的感叹句,一般情况下可以相互转换,转换后意义不变.如：
　　What an interesting story it is!==How interesting the story is!
　　what a beautiful bulding it is!==How beautiful the building is!