Answer:
Profesor, esta computadora está rota.
PROFESOR: ¡Imposible! Si apenas la compré.
La tengo hace sólo una semana. Ah, mira... ¿cómo va a funcionar si no la has encendido?
Explanation:
These are the words that best complete this text. In the first sentence, the student wants to say that the computer is broken. The verb in this case is "romper," and the correct form would be "rota." In the second sentence, the professor wants to say he recently bought the computer. This requires the verb "comprar" in its simple past, "compré." Finally, in the third sentence, the author tells is that the computer does not work because the student had not turned it on. For this example, we use the compound verb "has encendido" (from the verb "encender").