【正确答案】 A

【答案解析】[解析]感叹句的基本构成有两种形式：
①What a/an+adj．+n．+it+is!
What a fine day it is today!=What nice weather it is today!今天天气多好呀!
②How+adj．/adv．+人称代词+be动词!
How delicious they are!多么好吃啊!