M: What a boring speaker! I could hardly stay awake.

　　W: Well, I don’t know. In fact I think it’s been a long time since I’ve heard anyone is good.

　　Q: What do we learn from the conversation?

　　16.

　　W: I’m having a lot of trouble with logic and it seems my professor can’t explain it in a way that makes sense to me.

　　M: You know, there is a tutoring service on campus. I was about to drop statistics before they helped me out.

　　Q: What does the man mean?

　　17.

　　M: this is a stylish overcoat. I saw you wearing it last week, didn’t I ?

　　W: oh, that wasn’t me. That was my sister Jill. She is in your class.

　　Q: What does the woman mean?

　　18.

　　M: Jane, suppose you lost all your money while taking a vacation overseas, what would you do?

　　M: well, I guess I’d sell my watch or computer or do some odd jobs till I can afford a return plane ticket.

　　Q: what are the speakers talking about?