Little about Xinjiang Qiegao before the Qiegao Event happened in Hunan Province.
A. I had known
B. had I known
C. did I know
D. I knew
网友回答
A. I had known
(答案→)B. had I known
C. did I know
D. I knew
解析：考查倒装，因为Little位于句首，所以用倒装，助动词提前，所以选B，句子意思“发生在湖南切糕事件之前我不知道新疆切糕”