I watched the train until it in the distance. [ ] A.was disappearedB.was disappe
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![I watched the train until it in the distance. [ ] A.was disappearedB.was disappe](/pic/43_929314.jpg)
I watched the train until it ________ in the distance.
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A.was disappearedB.was disappearingC.disappearedD.had disappeared
试题答案
答案:C