题目:
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。
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,如:So loudly did he speak that even people in the next room could hear him. 他讲话声音那么大,隔壁屋里的人都听得见。