给下列句子排序。

1. Yes, now they are old.

2. Yes, now my hair is long.

3. Oh, who are they, Lingling?

4. They were young then.

5. Who is the little girl?

6. They are my grandparents.

7. It's me. I was two then.

8. But your hair was so short.

9. It's my best loved photo.

10. What's this?

正确的顺序是：_____________________