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