Hardly our walk when it began to rain.
A. we began
B. we had begun
C. had we begun
D. has we begun
网友回答
A. we began
B. we had begun
C. had we begun
D. has we begun
解析：选C。考查倒装。句式hardly. . . when. . . 表示“一……就……”, 主句使用过去完成时, 且把hardly放在句首时, 使用部分倒装结构, 故此题选C。