1. 为下列句子选择相应的答语

A. I started to study English when I was six. B. I learned to buy things. C. Yes, I did. D. When I was four.

1. （1） When did you started to use a computer?
3. （2） What did you learn to do when you were six?
5. （3） Did you started to study English?
7. （4） What about you?