---YouwereoutwhenIdroppedinatyourhouse.---Oh,Ifor

发布时间：2020-08-13 19:51:46

---You were out when I dropped in at your house.
---Oh,I    for a friend from England at the airportA.was waitingB.had waitedC.am waitingD.have waited

网友回答

A解析过去进行时可表示过去某一时间正在进行的动作或存在的状态。答语中暗含了when you dropped in at my house。
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