good time we are having!A. What B. What a C. How D. How a

问题补充：

good time we are having!

A. What

B. What a

C. How

D. How a

答案：

A. What

(答案→)B. What a

C. How

D. How a

解析：句意：我们玩的多么的开心啊！have a good time玩的开心，是固定表达，what 构成的感叹句后接形容词+名词，故选B