Are sisters in the bedroom?
Yes, they are
_______ the boy in the garden?
IS
Is Grandma in the bathroom?
No, she isn't
______ Grandpa in the kitchen?
IS
______ Grandma in the living room?
IS
Is Grandpa in the dining room?
No, he isn't
_______ brothers in the bathroom?
ARE
Is the boy in the garden?
Yes, he is
Are Dad and son in the dining room?
Yes, they are
Are brothers in the bedroom?
No, they aren't
_______ sisters in the bedroom?
ARE
_______ Dad and son in the dining room?
ARE