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   答案： C 让步状语从句 however做连接副词，相当于no matter how, 后接形容词或副词，意为“无论、不管” ，引导让步状语从句，其序为“however+形容词、副词+主语+谓语”。  

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