F: Lucy has a pet cat and David has a fish. I've always wanted a pet. Can I get a dog for my birthday this year? ,M: Yes, but you must promise to walk it every day.
(A) F: Sure. I am so happy that I am going to have a fish as a pet. (B) F: Sure. I am so happy that I am going to have a dog as a pet. (C) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) F: Sure. Although I have a fish, I still want to have a dog.
B