Answers:
1) busco un trabajo
2) cocina muy bien
3) mandan muchos mensajes
4) escuchan música clásica
5) trabaja en una oficina
6) tomamos clases de lenguas
7) nadamos
8) deseo viajar mucho
Explanation:
All this is is conjugating -ar verbs, which means you have to replace the -ar suffix with the correct ending corresponding with its pronoun. so you need the following endings:
Yo = -o
Tú = -as
Èl/ella/usted = -a
Nostros = -amos
Ellos/ellas/ustedes = -an
Note: For number 8, you only conjugate desear and not viajar because if you do that it translates to "I wish to travel a lot." If you conjugate both desear and viajar, it translates to "I wish I travel a lot."
I hope this was helpful!! :)