C omplete the passage , using appropriate words. Greek le t ter organizations are social organizations that exist in North American colleges.__1____ (Male/Man/Manly) groups are known as fratern i ties and ___2____ (female/woman/feminism) groups are known as sororities.The first Greek letter organization was ___3___ (found/find/founded) in 1776. It took the name Phi Beta Kappa because the Greek letters stood for a motto : Ph i losophy is the guide of life.These days there are __4___ (much/many/too) kinds of is the Greek letter organizations . They are very _5___ (unpopular/popular/populat i on)and students can make friends and form important social networks.