. that I was puzzled.A. So difficult a question did he ask meB. Such difficult a question

问题补充：

. 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

答案：

(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：考查固定句型。So/such... that...“如此......以至于......”，such+a/an+adj.+n.；so+adj.+a/an+n.。句意“他问的问题那么难，以至于我哦也很迷惑。”so谓语句首时，应该用部分倒装，即把谓语的一部分提到主语前。故选A。