Why are you late again? 你为什么又迟到了？

I'm sorry. I missed the bus. 对不起，我错过车了。

Do you think I will believe such a story agian? 你以为我还会相信这样的鬼话吗？

Well...er, to be frank, I got up late. 嗯···呃，坦白说，我起床晚了。

This is really embarrassing. 真是不好意思。

I shouldn't have done such a thing. This is really embarrassing. 我真不该做那样的事，真是不好意思。

It doesn't matter. Let's drop the subject. 没关系，我们别谈这个话题了。