读短文，选答案。 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 driver, ' Oh, I pay for my dog. Can he sit here like the other people? ' The driver looks at the dog and says, ' Yes, madam, but he must not put his feet on the chair '. 1. I am on a ___________. [     ] A. car B. bus 2. It's ___________ today. [     ] A. rainy B. sunny 3. The dog's feet are ___________. [     ] A. big B. not clean 4. The dog ___________ sit on the chair. [     ] A. can B. can't