In this exercise, you have to complete the sentence using the present progressive tense. The <u>Spanish present progressive</u> tense is also called present continuous tense and it is used to talk about something that is happening now.
In the sentence given, you have to write "está" and not "estás" because "Ud." means "usted" and is the formal "tú". "Está trabajando" is the second person formal singular present progressive form of the infinitive verb "trabajar".
1.nosotros fuimos montar al caballo 2.vas ir al campo? 3. Los hermanos Ortega fueron a dar una caminata 4.yo se montar en bicicleta 5.uds van a viajar alas montañas