2. ¿Quieres el libro? No., no __ quiero. a) 10 b) la c) los d) nos

## Step 1<br />The problem is a fill-in-the-blank question in Spanish. The sentence is "¿Quieres el libro? No, no __ quiero.". The blank needs to be filled with a word that matches the gender and number of the noun it refers to.<br />## Step 2<br />In Spanish, nouns have genders and numbers. The noun in this sentence is "el libro", which is masculine and singular. Therefore, the word that fills the blank must also be masculine and singular.<br />## Step 3<br />Looking at the options, we can eliminate "a) 10" and "d) nos" as they are not words that can refer to a book.<br />## Step 4<br />Between "b) la" and "c) los", "la" is feminine and "los" is masculine. Since "el libro" is masculine, the correct word to fill the blank is "la".