Answer:
Question 1: No conozco a los padres de Juan Carlos. (conocer)
Question 2: Marisa conoce las ciudades de Canadá. (conocer)
Question 3: Maru, ¿conoces/sabes donde estamos? (Ambos= both)
Question 4: Yo sé hablar italiano y francés (Saber)
Question 5: La señora Díaz conoce bien la capital de Mexico (conocer)
Question 6: Jimena y yo no conocemos a los otros turistas. (conocer)
Explanation: Conocer = is the same to "know", you use when you know somebody or some place or an object.
Saber = is the same to "know" but in another context, you know about a language, some subject of the school/college or a situation.