I am sorry you have been waiting so long .BUT
I am sorry you have been waiting so long .BUT
I am sorry you have been waiting so long .but it will still
I`m sorry you`ve been waiting so long,but it`ll still be som
I am sorry I _____(keep)you waiting so long.
I am very sorry for keeping you waiting so long.
i am sorry to keep you waiting so long
I am t__ sorry I have kept you waiting long.
I'm sorry to have kept you waiting so long.
before和till的区别 例 i'm sorry you've been waiting so long,but i
I am sorry to have kept you waiting so long.这句为什么用to have ke
I'm sorry to have kept you waiting so long 和i' m sorry to ke
[D100] I am sorry to _____ you waiting outside so long.