that I was puzzled.
A. So difficult a question did he ask me
B. Such difficult a question did he ask me
C. Such a difficult question he asked me
D. He asked me a so difficult question
网友回答
(答案→)A. So difficult a question did he ask me
B. Such difficult a question did he ask me
C. Such a difficult question he asked me
D. He asked me a so difficult question
解析：考查倒装句，So + 形容词或副词放在句首，使用部分倒装，助动词前提，所以选A。