Mi amigo ___ cómo entrenar a su perro. (My friend knows how to train his dog.)

¿___ (tú) cuál es el país más poblado del continente? (Do you (singular, familiar) know it's the most populated country of the continent?)

(I know Juan. He is a friend.) ___ a Juan. Es un amigo.

Mis hijos __ nadar. (My children know how to swim.)

Mario, ¿___ que el mesero de Chez Nous es tu vecino? (Mario, do you know that the waiter at 'Chez Nous' is your neighbor?)

Todos sus amigos ___ bucear. (All his friends know how to dive.)

Mi madre ___ la receta. (My mother knows the recipe.)

(Yo) no ___ a nadie que me pueda dar su opinión sobre este asunto. ( I don't know anyone who could give me his/her opinion about this matter.)

No, no ___ (yo) a tu hermano, Víctor. (No. I don't know your brother, Víctor.)

(Yo) ___ que no vas a volver. (I know you are not coming back.)