33K views · 427 reactions |  Learn English with BBC Learning English!  "OK" is one of the most frequently used and recognised words in the world. But what do the letters ‘O’ and ‘K’ actually stand for? We take a look at three popular theories about its origin.  Watch and let us know - when did you last use the word ‘OK’? | BBC Learning English | Facebook

16K views · 816 reactions | Learn the language for placing an order with English at Work. What should Anna say to Mr Lime? Watch this! | BBC Learning English | Facebook