La palabra que debes añadir es "pueda"
Answer:
Ricardo is quien
Telefono is que
Explanation:
Quien is who and que is what
Ricardo is who is talking and the phone is what he is using to talk
1) saben
2)conoce
3)conozco
4)sé
A)sabes
B)conoce
C)sabemos
D)sé
E)conocen
