Answer:
la primera creo
tu fuistes a España una vez cuando tenías ocho años
1. B, Because since your talking about how you like the math class you would use me and the yo form of guitar because it is grammatically incorrect and it doesn't flow right with the rest of the sentence.
2.C, because you would have to conjugate quedar to the you form and you would have to find the right word that means you which is te
Its a name so it stays the same
