ASK A QUESTION De quien son estas cosas? Use es o son. El libro de espanol__La Profesora
Welcome to the forum.
Answer these questions:
Is "es" singular or plural?
Is "son" singular or plural?
Is the book singular or plural?
So which word should you choose?
(by the way, I think that you are missing a word in your sentence)
That's the way I like to help with homework. Help them, but don't do it for them. Make them think a little and learn. I would give you double votes if I could, lol.
An example, in case you are totally lost.
el lápiz____el estudiante
El lápiz es del estudiante. (del=de+el)
los bicicletas____los chicos
Los bicicletas son de los chicos.