（　　）4. A. You are welcome.   B. Sorry, I’m busy now.    C. That sounds like a good idea.

（　　）3. A. Yes, please.            B. No, I’m not.                   C. And you?

（　　）2. A. Three years.           B. A year before.                 C. Three years ago.

（　　）1. A. I’d like.                B. Great.                            C. Yes, I’d love to.