(b) To pass on meaning to continue one's way is rendered seguir el camino; meaning to hand to, give to it is translated entregar or dar a.
When you have finished with it, pass it on to your friend.
Cuando Vd. haya acabado con él, entréguelo a su amigo.
He stopped to speak to us, but passed on immediately.
Se detuvo a hablarnos, pero siguió en seguida su camino.
(c) To pass (promote) is rendered aprobar; to pass (be promoted) is ser aprobado.
You will pass of course, but let's see if that professor will pass me.
Tu serás aprobado, eso sí, pero a ver si aquel profesor me aprobará a mí.
111. The verb to pay or pay for is usually pagar. Meaning to be profitable it is rendered ser provechoso.