I'm sorry to have kept you waiting so long 和i' m sorry to ke

I'm sorry to have kept you waiting so long 和i' m sorry to ke I'm sorry to have kept you waiting so long. 单选题 ---I’m sorry to have kept you waiting so long.--- 1.Don’ I am sorry to have kept you waiting so long.这句为什么用to have ke 分析语法 i'm sorry to have kept you waiting. I'm sorry to have kept you waiting. I’m sorry to have kept you waiting. ——i'm sorry to have kept you waiting. I'm sorry to have kept you waiting long. -----Never mind. I i'm sorry to have kept you waiting long.never mind.I（ ）here I’m awfully sorry to have kept you waiting for a long time. i'm sorry to have kept you waiting for a long time