Question

1. a ti ____ gusta el libro.

les
le
te
me

Explanation:

In Spanish, the verb "gustar" is used with indirect object pronouns. The phrase "A ti" indicates the second - person singular (you). The correct indirect object pronoun for "ti" (you, singular) with "gustar" is "te". "Les" is for third - person plural (them), "le" is for third - person singular (him/her/it), and "me" is for first - person singular (me). So the correct option is the one with "te".

Answer:

C. te (assuming the third option is labeled as C, if we follow the order: first option A. les, second B. le, third C. te, fourth D. me)