How old were you when you ____________for the first time?
tied your shoelaces
When did you learn to ____ _ ___ ?
ride a bike
How old _____ you when you started studying English?
were
When did you ______ a boyfriend or a girlfriend for the first time?
meet
How old were you when you ____ your first _____ ______?
took your first driving lesson
When ____ you travel for the first time?
did
How old were you when you first ______ ______ online?
bought something
When did you ____ your first _____?
get your first job
When did you ______ ________for the first time?
kiss someone
When did you ____ _____ a trip for the fisrt time?
go on a trip
How old were you when you ____ your first _____?
got/ pet