问题补充：
What it is to go swimming in weather!
A. a great fun; so fine
B. a great fun; such a fine
C. great fun; so fine a
D. great fun; such fine
答案：
A. a great fun; so fine
B. a great fun; such a fine
C. great fun; so fine a
(答案→)D. great fun; such fine
解析：感叹句一般有两种结构：what +(a/an)+形容词+名词+主语+谓语！名词是复数或不可数名词，不加a/an.how+形容词+主语+谓语！fun不可数名词。so、such 区别So，如此，那么，用法是so+形容词，such,如此，那么。用法是：such+(a/an)+(形容词)+名词，weather不可数名词，故选D
