https://online2.tingclass.net/lesson/shi0529/0009/9379/24.mp3
https://image.tingclass.net/statics/js/2012
Y: I'm sorry I'm late.
Y:真抱歉，我迟到了。
X: Oh, that's all right. I just wondered what was keeping you.
X:哦，没关系。我刚才还在想什么事把你耽搁了。
Y: The bus I took.
Y:是我乘的公交车把我耽搁了。
X: What do you mean?
X:怎么讲呢?
Y: I took the wrong bus.
Y:我乘错车了。
X: Oh, did you? That's very easy to do.
X:哦，这样啊?那是常有的事。
