题目内容：

Only when I left my parnets for Italy ___how much I loved them.
A.I realized.B.I had realized.

优质解答

did I realize
考查部分倒装,【only+状语 位于句首,主句需部分倒装】夲句等于：
I realized how much I loved them only when I left.

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答案没给完，这是D选项，我选的也是它，谢谢