Answer:
The correct option that fills the blanks in each case is:
1. Mi novia está enojada. No quiere hablar <u>conmigo</u>.
2. Los recién casados no llegan a la fiesta. Todos están hablando <u>de ellos</u>.
3. No nos conocemos bien. Quiero saber más <u>de ti</u>.
Explanation:
In the blanks is used <u>the equivalent of object pronouns</u>, but in Spanish, this will be better explained with the translations:
1. My girlfriend is angry. He doesn't want to talk <u>to me</u>.
2. Newlyweds do not arrive at the party. Everyone is talking about <u>them</u>.
3. We don't know each other well. I want to know more about <u>you</u>.
How you can see, in the blanks are used object pronouns, I mean, <u>words that replace the nouns in the complement of a sentence</u>, now, to identify which word must be used, I will address each sentence separately:
1. The woman is angry with her boyfriend, for this reason, she doesn't want to talk to him, and how He is telling us that, the answer is "to me" in English, or <em>"conmigo"</em> in Spanish.
2. How the newlyweds don't arrive, everyone talks about the persons that aren't in the party "them" or in Spanish <em>"ellos"</em>.
3. A person says to another that they don't know well, so want to know more about the other, but how the conversation is in the first person, the object pronoun used is "you" in English and <em>"de ti"</em> or <em>"a ti"</em> in Spanish.