Only when I left my parents for Italyhow much I loved them.A. I realizedB. I had realizedC

问题补充：

Only when I left my parents for Italyhow much I loved them.

A. I realized

B. I had realized

C. had I realized

D. did I realize

答案：

A. I realized

B. I had realized

C. had I realized

(答案→)D. did I realize

解析：本题考查only + 状语置于句首，倒装句的用法。