Cantante = singer (masc. or fem.) - el cantante, la cantante
bailarín = dancer (masc.) - el bailarín
atleta = athelete (masc. or fem.) - el atleta, la atleta
joven = young / young person (masc. or fem.) - el joven, la joven
B. Bailarín can refer to a boy, but not a girl, because the feminine is bailarina. All the others can refer to both boy or girl.
1) Nos despedimos
2) consiguió
3) elegí
4) midió
5) pidió
Believe top ones are self sentence answers and bottom is fill in the blanks , what are you confused with ?