I'm( )sorry for keeping you waiting so long,括号里用true的正确形式填空

I'm sorry to keep you_______(wait) for em for a long time. I'm sorry I-------------(keep)you waiting for such a long time. I'm sorry I ___(keep) you waiting for such a long time i'm sorry to keep you ----（wait） for a long time I'm sorry to keep.为什么keep前面加to i'm sorry for your I`m sorry for it I'm sorry to keep you （）for a long time.I'm sorry to keep you （）for a long time.a to wait b waiting c waitd waited .I'm sorry to keep you ___ for a long time.A.to wait B.waiting C.wait D.waited I’m sorry to keep you _(wait) for a long time 适当形式为什么填waiting I' m sorry to keep you waitting for a long time.这句话为什么用wait的进行时? I'm sorry ,sorry for the thing I I'm sorry to keep you_______(wait)so long I'm sorry for this 怎么翻译 I'm ____(terrible) sorry for this. I'm so sorry for you i'm very sorry for it I’m sorry for your tenderness