Hi! I noticed that your question was somewhat incomplete so I went online to search for the rest. The point of the exercise is to "escribir los signos de puntuación necesarios en las siguientes oraciones" (write the necessary punctuation marks in the following sentences).
Answers:
1) Cuando llegó Emilia, la cuñada de mi amiga, todo se aclaró.
When Emilia, my friend's sister-in-law, arrived, everything became clear.
2) Toda mi familia, incluido mi hermano, estaba de acuerdo.
All of my family, including my brother, agreed.
3) Ayer me compré tres libros, un ordenador, una impresora y dos pares de zapatos.
Yesterday I bought three books, one computer, one printing machine and two pairs of shoes.
4) No te vayas sin sacar a pasear al perro, recoger el correo y limpiar la casa.
Do not go without taking the dog for a walk, picking up the mail and cleaning the house.
5) Su hija mayor es alta, la pequeña baja.
His older daughter is tall, the younger one is short.
6) Hazlo si quieres, pero luego no digas que no te avisé.
Do it if you want, but don't tell me I didn't advice you first.
Explanation:
For this exercise, I added commas where it felt necessary to do so.
Commas, in Spanish, have different uses.
In the first two sentences, commas are used for appositions. Appositions are used to describe the subject (la cuñada de mi amiga is describing Emilia, the subject of the first sentence).
Sentences 3, and 4 use commas to separate items in a series.
Sentences 5 and 6 use commas to compound two sentences.
