Only when I left home to go to college ___ how much my mother had done for me.A．did I realizeB．I rea

题目简介

Only when I left home to go to college ___ how much my mother had done for me.

A．did I realize

B．I realized

C．had I realized

D．I had realized

题型：单选题难度：中档来源：不详

试题分析：句意：只有当我离开家去上大学，我才意识到妈妈为我做了多少事情。这句话用only+时间状语从句，放在句首，后面的主句用部分倒装，助动词提前，因为realize这个动作，就是发生在when I left home to go to college，所以用一般过去时，所以选A。