Question

When I was 13years old，a boy gave me an important gift【改为同义句】

Answer 1

I received an important gift from a boy at the age of 13.

Answer 2

At the age of 13，a boy gave me an important gift.

Answer 3

It's the year when I was 13 years old that a boy gave me an important gift.

Answer 4

我认为依凡 Maggie的好，楼下两位的改法会引起歧义，到底是我自己13岁呢，还是the boy 13岁。