Final answer:
To fill in the blank correctly, use the verb 'saber' conjugated in the first person singular form, which is 'sé' in this case.
Step-by-step explanation:
To fill in the blank in the sentence 'Yo no sé la película Los abrazos rotos.' correctly, we need to use the verb 'saber' conjugated in the first person singular form, which is 'sé'.
Learn more about Spanish verb conjugation