| A | B |
|---|
| S: What is that, Mike? | M: Don't you know? It's an iguana. It's my favorite pet. |
| S: Really? Is it a pet? How interesting. | M: Do you also have any pets? |
| S: Not right now, but my dad will get a pet for me for my birthday. | M: What kind of pet do you want? |
| S: I like dogs. They are very loyal. | M: Yes, but they're also a lot of work . How about a cat? They don't take much work. Cats are the most popular pet in the States. |
| S: Cats? Well, I'll think about it. | M: .... |
