问题
选择题
Only when I left my parents for Italy, ________how much I loved them.
A．I realized
B．I had realized
C．had I realized
D．did I realize
答案
答案：D
考察主谓倒装结构，根据上文可知下文叙述的是过去的事情，故用过去时态，选D，直到我离开父母去意大利时，我才意识到我是多么爱他们。