11.Two-word Verbs 成语动词

A: Hi, Mary, how are you doing?
B: Fine. What happended to you yesterday? I didn't see you in class.
A: Oh, I overslept as usual. What went on anyway?
B: We heard about two-word verbs.
A: What's a two-word verb?
B: Things like drop in, go over, get out, fill up. Listen to these two sentences: citation¹ will run in the third race tomorrow; Mr.Lee will run in to see you tomorrow. Can you tell which run in is the two-word verb?

Notes
How are you doing? 同how are you? (美国人见面时常用的问候语)
What happened to you yesterday? 昨天你出了什么事？
What went on? 发生了什么事？
Citation 一匹赛马的名字
Run in 顺便来访

A：喂，玛丽，你好吗?
B：很好。昨天你出了什么事？我在课堂上没有见到你。
A：啊，像往常一样睡过头了，难道有什么事？
B：我们学了一些成语动词。
A：什么成语动词？
B：像drop in, go over, get out, fill up这些词。听听下面这两句话：Citation will run in the third race tomorrow; Mr.Lee will run in to see you tomorrow. 这两句中都有run in，你能说出哪一个是成语动词吗？