I am sorry to have kept you waiting for a long time.
I am 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
Sorry to have kept you waiting for such a long time.
-Sorry to have kept you waiting for so long a time.
I am t__ sorry I have kept you waiting long.
I am sorry to keep you waiting for me for a long time
--i am sorry to have kept you waiting long ---never mind .i
i'm sorry to have kept you writing for a long time
I'm sorry to have kept you waiting so long.
i am sorry to have kept you waiting.
I'm sorry.I have kept you ()for me so long.A:wait B:waiting