Answer:
1. Se las envié.
2. Ella se la compró.
3. Él me lo recomendó.
4. Él te lo sirvió.
5. Quién nos la vendió?
Explanation:
Identifying the narrator and the time that a sentence indicates is the first step that must be taken. this is very important to be able to logically conjugate the verbs, and that these have concordance with what is being expressed
12- Sueño ___ ser famosa.
Answer 12: con
Entire sentence: Sueño con ser famosa.
Translation: I dream of being famous.
13- Nos ponemos ___ trabajar mucho.
Answer 13: a
Entire sentence: Nos ponemos a trabajar mucho.
Translation: We get to work a lot.
14- El chico se arrepiente ___ no tener su tarea.
Answer 14: de
Entire sentence: El chico se arrepiente de no tener su tarea.
Translation: The boy regrets not having his homework.
15- ¿Cuál es correcta?
Answer: Es imposible de aprender.
Translation: It is impossible to learn.