Answer:
1. Estamos.
2. Están.
3. Estás.
4. Está.
Step-by-step explanation:
In this exercise you have to complete the blanks taking into account the different forms of the verb "estar". The verb "estar" should be conjugated according to the person. For example:
1. Mónica y yo estamos delante de la biblioteca.
In this case you should conjugate the verb "estar" using the third plural person "nosotros" (we).
2. Natalia y raúl ahora están enfermos.
In this case you should conjugate the verb "estar" using the last plural person "ellos" (they).
3. ¿Cómo estás tú, Carmen?
In this case you should conjugate the verb "estar" using the second singular person "tú" (you).
4. Los miércoles Sebastián está en el estadio.
In this case you should conjugate the verb "estar" using the third singular person "él" (he).