【题目】______you may have，you should gather your courage to face the challenge.
A. However a serious problem
B. What a serious problem
C. However serious a problem
D. What serious a problem
在线课程【答案】C
【解析】考查让步状语从句：句意：无论你可能遇到多么严重的问题，你都要鼓足勇气面对挑战。Whatever后面接名词，排除D。however/no matter how后面可以接adj+冠词+名词，故选C项。