A: Linda, I want to buy Bob a pet for his birthday. What shall I give him? Could you give me some suggestions?
B: Why don't you buy him a dog? Dogs are so friendly.
A: Yes, I know. But Bob has got a dog.
B: How about a rabbit? Rabbits are lovely.
A: But Bob doesn't like rabbits.
B: Have you thought about buying him a bird.
A: He hates birds.
B: Then you can buy him some tropical fish（热带鱼）. They're pretty.
A: That's a good idea. Where can I get them?
B: The market. Shall we go right now?
A: All right.