选择合适的答语。 ( ) 1. How much are those runners? ( ) 2. Do you like this one or that one? ( ) 3. Do you have any basketballs? ( ) 4. What are you doing? ( ) 5. Can you throw it? a. I'm hitting the ball. b. Yes, we do. c. No, I can't. d. They are ten dollars. e. I like this one.