1. A caballo regalado no se le mira el colmillo.   Out of sight, out if mind.   One cannot put back the clock.   Never look a gift horse in the mouth.   Love laughs at locksmiths.   Hint Half-n-half Clue   2. Lo pasado, pasado esta.   Let bygones be bygones.   One is never too old to learn.   Little strokes fell great oaks.   Nothing succeeds like success.   Half-n-half Clue   3. Peor es nada.   Never say die.   Let bygones be bygones.   Men are known by the company they keep.   Necessity is the mother of invention.   Half-n-half Clue