-- nice day it is today! Let’s go out to play shall we? That’s a good idea. A. How a

问题补充：

-- nice day it is today! Let’s go out to play, shall we?

-- That’s a good idea.

A. How a B. What a C. How

答案：

解析：此题主要考查感叹句。感叹句构成有两种：What + a(n)+ 形容词 +名词 +主语+ 谓语！How +形容词/副词+主语+ 谓语！day是可数名词，用What a，选B.