Final answer:
The appropriate verb to fill in the blank is 'lee' (OA).
Step-by-step explanation:
The appropriate verb to fill in the blank in the sentence 'el libro de historia' is 'lee' (OA). In Spanish, the verb 'leer' means 'to read.' Since 'el libro de historia' translates to 'the history book' in English, the correct form of the verb is 'lee' which means 'he/she reads.' Example: Juan lee el libro de historia.
Learn more about Verb conjugation in Spanish