For the verb form <span>él cree, there are only two correct options: 3rd person and singular.
It is the third person and singular because él in Spanish means he in English, which is 3rd person singular.</span><span>
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<span>Yo entro en la cabina telefónica para usar el teléfono.
Hope it helped!
</span><span>Espero que haya sido de ayuda!</span>