It's time to go home now. I am on a bus on a rainy day, and a woman with a dog gets on the bus. It is a big dog and its feet are not clean. I don't want the dog to sit near me. But the woman says to the conductor . "Oh, I pay for my dog. Can he sit here like the other people?" The conductor looks at the dog and says, "Yes, madam, but he must not put his feet on the chair." What do I see?   _  .
A bus A girl A dog A woman with a big dog.