W: Hi, Fred. Where have you been?
M: I've been to the library and borrowed some English theks. Why do you ask?
W: I thought you'd been to the post office. Did you find the money I left on the desk?
M: Yes, l0 yuan altogether. But I don't know what it is for.
W: Didn't you see the note I left to you with the money?
M: Note? What note? l don't see any note.
W: Really? It's very strange. I left the money with a note saying I wanted you to go to the post office and get some envelopes and stamps for me. I also put the ink bottle on them in case they might not draw your attention.
M: I see now. Why can't you go and get them yourself? The post office is only about 13 minutes' walk from here. We often walk there after supper.
W: Of course I know how far it is from our school. I can't go there myself because I'm very busy doing some chemical experiments in the lab. And what's more, I have to prepare for my English exarn. You know I failed in the last one. If I can't pass this time, a hard time will be waiting for me.