Only when I made it to the train station that I had left my ticket at home. [ ]
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![Only when I made it to the train station that I had left my ticket at home. [ ]](/pic/43_865775.jpg)
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
试题答案
答案:B