句型转换。

1. He started to learn the piano when he was five years old.

    He started _____ the piano at the _____ of five. (同义句)

2. He was first in the competition.

    He _____ first prize in the competition. (同义句)

3. I took part in the school football team last year.

    I _____ the school football team last year. (同义句)

4. He hiccupped for 69 years and 5 months. (对画线部分提问)

     _____ _____ did he hiccup?

5. I was born in Beijing,  in 1988. (对画线部分提问)

     _____ and _____ were you born?

6. I think there is something wrong with his plan. (改为否定句)

    I _____ think there is _____ wrong with his plan.