I'm pretty sure you would put "Leo" in the blank space because the verb "leer" means to read and the sentence prior to the blank space says "the magazine 'Cosas (or Things)' is my favorite. I read it every month. Hope this helps!
Estuviste because estuviste is past tense for tú
Answer:
You better not look for this
Answer:
Antonio Lava su carro los fines de semana.
