--- nice weather it is today!
--- Yes, shall we go walking in the park this afternoon?
A. What an
B. How
C. What
D. How an
网友回答
A. What an
B. How
(答案→)C. What
D. How an
解析：：本题考查的是what 和how 引导的感叹句，其结构分别为：what+a或an +adj+n(可数名词单数形式)+主谓！或what+adj+n（可数名词复数或不可数名词）+主谓！How+adj或adv+主谓！即将主谓去掉之后，最后一个单词为名词，前用what，将主谓去掉之后，最后一词，为副词或形容词，前用how，故选C