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.
Hi !!
1 =e =nosotros estamos
2 = a = tu estas (accent on the a and u)
3 = c = él esta (accent on the a)
4= b = yo estoy
5 = d = ellos estan (accent on the a)
Hope I helped though I can't put the Spanish accent....
C.ñ is a Spanish letter for example: niño
Hola <span>Jwhdjhdug2213</span>, ¿como estas?