问题补充：
It is hard for me to imagine what I would be doing today if I in love , at the age of seven , with the library in my hometown .
A. wouldn’t have fallen
B. should not fall
C. had not fallen
D. were not to fall
答案：
A. wouldn’t have fallen
B. should not fall
(答案→)C. had not fallen
D. were not to fall
解析：本题考查虚拟语气在含有if从句的复合句中的用法。主句表示与现在事实相反，用would do，从句与过去事实相反，用had done。故选C。
