We have to sell it to her.

19. Tenemos que vendér BLANK.
20. BLANK tenemos que vender.

You are working with Direct Object Pronouns (me, te, lo, la, nos, os, los, las) and Indirect Object Pronouns (me, te, le, nos, os, les)

When both are in a sentence, the Indirect comes before the Direct BUT when le or les is followed by lo, la, los, or las they become "se."

Usually they go before the conjugated verb BUT you have a choice with an infinitive or gerund (-ndo form). Then they can either go in the usual position (before the conjugated verb) OR be attached to the infinitive or gerund, remembering to add an accent mark where you want to HEAR the stress.

Ordinarily we do NOT do the homework for you, but help you with what YOU DO. However, in this case, I will do the example for you. Then, if you are wise, you will try others, post them here, and have me check them for you.

This is an infinitive so you have a choice; either (a) or (b)
a. Tenemos que vendérselo. (to her is le and since I don't know what it is, I'll use the masculine singular lo. Note which comes first, what happens to it (le = se) and the accent mark.

b. Se lo tenemos que vender.

NOTE: Since you have no idea whether "se" stands for the singular "le" or the plural "les" you might add this at the end to explain it = a ella

I'll flag this and come back later to see if you have additional questions.

Sra

Se lo tenemos que vender a ella.

Le tenemos que vender a ella.

BOTH ARE CORRECT
SUERTE!!!

Tanisha's first is OK but the 2nd is incorrect.

Sra

To fill in the blanks in the sentences, we need to find the appropriate Spanish words.

In sentence 19, the missing word that means "it" is "lo". Therefore, the complete sentence would be "Tenemos que venderlo a ella" which translates to "We have to sell it to her."

In sentence 20, the missing word is "lo" again. The complete sentence would be "Lo que tenemos que vender" which translates to "What we have to sell."

To find the correct words to fill in the blanks, it's important to understand the grammar and vocabulary of the language. In this case, knowing that "lo" is a pronoun that means "it" in Spanish helped us find the correct answer. Additionally, understanding the structure of the sentences and how the words fit together also played a crucial role in finding the appropriate words.