翻译英文：
1）我七岁是开始学钢琴。（when/learn the piano）
2）你第一次参加夏令营时多大年龄？（when/go to summer camp）
3）托尼年龄太小，不能独自待在家。（too...to.../all by himself）
4）我是否老的不能学跳舞？(too...to...)
參考答案:1]when I was 7 years old , I began to learn to
piano .
2)How old are you when you first went to summer camp.
3)It is too young for Tony to stay at home all by himself.
4)Am I too old to learn to dance?