Respuesta:
a. N: Betty is not hungry right now.
I: Is Betty hungry right now?
b. N: The kitchen is not clean.
I: Is the kitchen clean?
c. N: The children are not at a summer Camp.
I: Are the children at a summer Camp?
d. N: Ron and Dave are not brother and sister.
I: Are Ron and Dave brother and sister?
Explicación:
Las Oraciones Negativas con el Verbo to be se forman de la siguiente manera:
Sujeto + Verbo to Be + Not + Complemento.
Las Oraciones Interrogativas con el Verbo to be se forman de la siguiente manera:
Verbo to Be + Sujeto + Complemento?.