For the boot words you would change the letters to e-ie or e-i. So basically for nosotros and vosotros which are not part of the boot you would not change the letters and it would be the same in the middle of the word but it have a different ending. So like number 2 it's nosotros so it would be nosotros servimos.
Answer:
Sandrita y Julián van al parque de atracciones.
Explanation:
van is more than 1 person and in the present
It's "ellos vivieron en Europa"
Vivieron is past tense for "lived".
E. Yo soy Maria......................................................................
The answer is A: Esta
hope this helps :)