I'm so sorry You're welcome 像这些句子里面 I'm中间那个点代表什么?

I'm sorry I'm late.的答句是You're welcome.还是That's all right. I'm sorry.I'm late for class!A ok B You're welcome c All rig I'm sorry you're blue I'm so sorry that I hurt you.Sorry that I fell through什么意思 I'm so sorry to you . I'm so sorry for you i'm sorry,misunderstanding you.maybe i'm so nervous I'm sorry,so sorry.I think i won't forget you -.Sorry,I miss You're I'm can only do so.I'm sorry you're not what I want.But it was d drowee,I'm so sorry I'm so sorry but I love you都是谎言.