高二英语：高二英语每日一练（41）

　　So difficult______it to work out the problem that I decided to ask Tom for advice.
　　A. I did find
　　B. did I find
　　C. I have found
　　D. have I found
　　答案：B
　　解析： 以so+形容词开头的句子要进行倒装，构成“so+形容词+倒装+that从句”结构。表示“……那么……，以至于……”。