A : Hey, why are you staying here so late?
B : What? Are you closing already? It’s only 9 p.m.
A : No, It’s just I’ve never seen you stay this late in the library.
B : I have to turn the paper in. My next class is tomorrow morning. Why are you still here, anyway?
A : I work here. I need to work part-time to pay for my tuition. Here, I get to sit and work on my class assignment. Also I can choose what day and time I went to work.