I’m awfully sorry to have kept you waiting for a long time.

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 I am sorry to have kept you waiting for a long time. I'm sorry to have kept you waiting so long. i'm sorry to have kept you writing for a long time Sorry to have kept you waiting for such a long time. -Sorry to have kept you waiting for so long a time. I'm sorry.I have kept you ()for me so long.A:wait B:waiting I'm sorry to have kept you waiting so long 和i' m sorry to ke 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 单选题 ---I’m sorry to have kept you waiting so long.--- 1.Don’