Before you o somewhere try and learn as much as you can about their culture. Don't want to go somewhere and the people kill you because you did something they think is terrible. Oh and learn the basics of their language
Esas chicas
El libro es mío
Mi libro
Estos zapatos
Suyas
Is B.
It would be in English: my brother and I could buy them.
Hello
your answer will be
<u><em>Si yo estuviera en San Sebastian, yo estuviera en un balneario</em></u>
have a goed day!
Ellos
cuz it’s plural (2 ppl) and then it’s a guy and a girl so it’ll go with the masc pronoun so ellos