Not until the train pulled into the station --- that the suitcase was gone.A.did he find B.had he found C.he had found D.he found选哪个啊 为什吗

问题描述:

Not until the train pulled into the station --- that the suitcase was gone.
A.did he find B.had he found C.he had found D.he found
选哪个啊 为什吗