Question

【题目】 So difficult____it to work out the problem that I decided to ask Tom for advice.

A. I did find B. didI find

C. I have found D. have I found

Answer 1

【答案】B

【解析】

试题分析：句子使用的基本句式为so…that…结构。按英语语法，当该结构的so置于句首时，其后的句子（主句）要用倒装语序。