Solución ejercicio 4 to be interrogativo

Ejercicio 4. Responde las siguientes preguntas.

a) are you happy? (sí)  
Yes, I am.
b) is he Spanish? (no)
No, he isn't.
c) is she Alison? (sí) 
Yes, she is.
d) is it your dog? (no)
No, it isn't.
e) are you French? (no)
No, I'm not.
f) are they at the airport? (sí) 
Yes, they are.