Final answer:
The sentence 'Me gusta libros' is incomplete. The correct verb to complete the sentence is 'leer', which means 'to read'.
Step-by-step explanation:
The sentence 'Me gusta libros' is incomplete. 'Me gusta' means 'I like' in Spanish and it needs to be followed by a verb. In the given options, the correct verb to complete the sentence is 'leer', which means 'to read'. So the correct sentence would be 'Me gusta leer libros' which translates to 'I like to read books'.
Learn more about Spanish verbs