Only when I made it to the train station _______ that I had left my ticket at ho

题干

Only when I made it to the train station _______ that I had left my ticket at home.

A．have I realized

B．did I realize

C．had I realized

D．would I realize

上一题下一题 0.4难度单项选择更新时间:2011-11-20 10:20:04

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