It is hard for me imagine what I would be doing today if Iin love at the age of seven with

问题补充：

It is hard for me imagine what I would be doing today if Iin love,at the age of seven,with the Melinda Cox Library in my hometown.

A. wouldn’t have fallen

B. had not fallen

C. should fall

D. were to fall

答案：

A. wouldn’t have fallen

(答案→)B. had not fallen

C. should fall

D. were to fall

解析：根据题干中“What I would be doing today”可知，这是表示与现在事实相反的主句结构，而在if引导的条件状语从句中所给的时间状语为at the age of seven,故从句应用与过去事实相反的虚拟结构（过去完成时）。