1. Conocen
2. Sabemos ( I think the sentence is a bit wrong itself bc it should be Ellos (they) instead of nosotros (we) but thats maybe a book or question error)
3.sirven
4.pides
Buena suerte! Good Luck!
Answer:
1. Sobrino 2. Primos 3. Abuelita 4.Sobrina
