1.

UNTIL

she went out on her first date, she was very shy.

2.

BEFORE

I started college, I used to listen to rock music all day long.

3.

BY THE TIME

Sandra was four years old, she had already visited three countries with her Mom.

4.

ONCE

my father started learning French, he quit studying other languages.

5.

AS SOON AS

he got his driver's license, his parents let him drive everywhere.