the matter is settled or finished
l'affaire est réglée ou terminée (l'affaire est reglee ou terminee)
"The evidence was clear, so it’s case closed."
"La preuve était évidente, donc c'est cas fermé." (La preuve etait evidente, donc c'est **cas ferme**.)
to show others how to do something by demonstrating it yours...
to share an opinion about a topic
to work very hard to achieve something
to be completely focused or revolve around something
To be very sure or confident about something.
to work extremely hard