“Are you OK?” “Yes, I am OK.” You may hear this kind of talk around you. “OK” ____most widely ________(use) around the world. Where did “OK” come from?  Let’s take a look!
“OK” was first written in the Boston Morning Post on March 23, 1839. It read: o.k. - oll correct (all correct). It was only a joke at that time. But later “OK” _____(become) popular. People used it______ (say) that all was well.
Today we use this expression many times a day.