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!
It would be "Sé Bueno" if thats what your looking for
Eres bueno = you are good
ser bueno = to be good
seas bueno , I really don't know but I it's not the answer
Answer:
Laura: I suggest you make a reservation in advance.
Answer:
Ser is used in a simple way, to talk about WHAT something is (permanent state). .
Ana está cepillándose los dientes.