11.  my father is forty-four years old.

12.  When I was two years old, he was working in Bei Jing .

13.  I was so glad though I was only two years old at that time.

14.  Now, I'm growing up , but she is more and more older .

15.  When I studied at a middle school, I liked riding my old bick to go to school.

16.  they helped him, when he was older, one day he saw an old friend of his .

17.  At that time I was about twelve years old.

18.  China is one of the oldest countries in the world.

19.  Lanlan , who is only five years old, found the perfect place to hide.

20.  I am older than her.