I'm sorry to have kept you waiting long
I'm sorry to have kept you waiting so long.
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
I’m awfully sorry to have kept you waiting for a long time.
单选题 ---I’m sorry to have kept you waiting so long.--- 1.Don’
i'm sorry to have kept you waiting for a long time
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 am t__ sorry I have kept you waiting long.