1- escoger audio listen to what people are doing and choose the matching description. es profesor. es estudiante. es botones. es inspector de aduanas.

As you did not provide the script for the audio or any farther information, I think you are referring to the " present progressive audio" so the sentences would be the following: 
1 Profesor: Jose Luis está enseñando fisica
2 Botones:  Manuel está llevando el equipaje de los huéspedes.
3- Inspector de Aduana:  Carlos está pidiendo los pasaportes a los viajeros
4 Estudiante: Yo estoy dibujando el paisaje. 

* it is not clear if a student is related to art. This sentences can be also associated to "Artist" as a profession.