important news report it is!A. WhatB. What aC. What anD. How

问题补充：

important news report it is!

A. What

B. What a

C. What an

D. How

答案：

A. What

B. What a

(答案→)C. What an

D. How

解析：what引导的感叹句的中心词应是名词，根据题干的意思可知，中心词是report是可数名词的单数形式故其前要加不定冠词，important是以元音因素开头的要用an.故选C.