Answer:
1. que
2. lo que
3. quienes
4. que
5. quienes
6. quien
Explanation:
You must complete with "que", "quien", "quienes" or "lo que" the following sentences:
1. The neighbors who live in front of my house are very nice.
2. Rosa and Pepe travel a lot, which exposes them to many cultures.
3. The friends with whom you study at the university are from several cities.
4. The apartment that Rebeca and Jorge rented is near the center.
5. Adrián and Daniel, who study physics, are computer experts.
6. Rubén should ask Marcos for a vacuum, who was given one.
