estoy is the answer to the question
Answer: lo
Eduardo: ¿Compraste el libro para Mateo? Fernando: Sí, lo compré.
Translation:
Eduardo: Did you buy the book for Mateo? Fernando: Yes, I bought it.
Explanation: "Comprar" is a transitive verb and needs a direct object to complete its meaning. If we want to replace a direct object with its pronoun, it has to agree in gender and number with the direct object.
Since the direct object in this sentence is "el libro", which is a masculine and singular noun, the direct object pronoun is "lo". Lo compré.
Answer:
okay so for #8, its it is the first one " el preferred esperar".
# 9: it is also the first one " Ayer, Miguel durmio mucho".
#10 it would be the last one " Se Casaron el Verano pasado.
#11: it is the second one cause its the one that makes most sense even though it doesn't have "el"
Explanation:This is due to the ball accelerating as it travels farther down the inclined plane. ... There is constant acceleration, meaning that speed constantly increases per second.