it is to go for a hike in such lovely weather!A. How funB. How funnyC. What fun D. What a

问题补充：

it is to go for a hike in such lovely weather!

A. How fun

B. How funny

C. What fun

D. What a fun

答案：

A. How fun

B. How funny

(答案→)C. What fun

D. What a fun

解析：考查感叹句：how与what 都可以引导感叹句，但是how 后面接的是形容词。what后面接的是名词。fun在这里是个名词，而fun作名词时是个不可数名词，所以就成了what fun 了，句意：这么好的天气出去远足真是有趣的事情。选C。