Answer
You could just go to translate and type in and it will give you the answer.
Answer:
Se
Explanation:
The answer is se because saber is the term used for if you know something or of someone, you would use conocer if you knew a person personally
11. Está tomando
12. le está gritando
13. Estamos invitando
14. Estoy comprendiendo
15. Estás corriendo
