I DIDN'T KNOW HOW TO RIDE A BICYCLE UNTIL I WAS FIVE YEARS OLD. IT...

1. - DE DAP AN KTRA K10 BAI SO 4 HK2
DE DAP AN KTRA K10 BAI SO 4 HK2

1. I didn't know how to ride a bicycle until I was five years old.

 It was not until ____________________________________