【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】how+形容词+主语+谓语！what+a\an+形容词+主语+谓语！AD明显错误。逗号前面的部分用作状语， however可以引导的让步状语从句。句意：不论遇到多严重的问题，你都要鼓足勇气面对挑战。