Excuse me, may I ask you something?
打扰一下,我可以问你一些事吗?
A. Sure, how can I help you?
A.当然可以,有什么我可以帮到你?
B. No, go ahead.
B.没事,继续。
C. I'm sorry I was late today.
C.对不起我今天迟到了。