给下列的问句选择答语。 ( ) 1. What is your father? ( ) 2. What happened? ( ) 3. How did you go to school? ( ) 4. What did you do yesterday? ( ) 5. Did you have a nice trip? A. I hurt my knee. B. I went to school by bus. C. He's a teacher. D. Yes, I did. E. I bought a gift for my brother.