第1个回答 2009-04-09
Sorry for keeping you.
第2个回答 2009-04-09
Sorry for keeping you waiting so long.
第3个回答 2009-04-09
Sorry to keep you waiting ;
i'm sorry that you waited for me for so long .本回答被提问者采纳
第4个回答 2009-04-09
Sorry to keep you waiting so long
第5个回答 2009-04-09
To have kept you waiting