That is impossible. Opportunity doesn’t come knocking twice!
Because seven just came back from a trip to West Africa.
They both make a lot of noise to let you know they are coming.
A bird who knocks before delivering its message !
Knock, knock, knockin on Heavens door
Me: why Him: Timmy has no arms. Knock knock. Me: Who's there Him: Not Timmy.
No, cows go moo.
So they can open doors of opportunity for their students.
ON AN OPPORTUNITY