Question

fill in the blank with the correct demonstrative adjective or pronoun. ____ (this) libro es interesante. o este o esta o éste o ésta

Explanation:

In Spanish, "libro" is a masculine - singular noun. The demonstrative adjective "este" is used for masculine - singular nouns, while "esta" is for feminine - singular nouns. Also, the accent in "ésta" is used when it is a pronoun, not an adjective. Here, we need a demonstrative adjective for the masculine - singular "libro".

Answer:

A. Este