- hard work you have done! -It’s very kind of you to say so.A. WhatB. HowC. What aD. How a

问题补充：

- hard work you have done!

-It’s very kind of you to say so.

A. What

B. How

C. What a

D. How a

答案：

(答案→)A. What

B. How

C. What a

D. How a

解析：本题为感叹句，感叹句的结构通常是what+修饰词+名词，若名词是可数名词单数，在修饰词前需加不定冠词，如不是无需加不定冠词，how+形容词或副词，本题中的中心词work是不可数，故选A。