Uhhhhhh what nada hablor espanol
Escuchamos
Creerán
Escuche
The answer is (acabe) because it refers to the fact that he has not finished his studies and when he finishes it he could finally be an astronaut.
Es corrrecta si la descrubrio crsitobal colon y tenia 3 barcos la pinta, la niña y la santa maria
Comeran would be the answer to the first choice