The question would be : Is he in the kitchen?
My refrigerator is in the kitchen.
No idea. But if you want to make a sentence into a question you add a question mark, don't you?
she wondered in the kitchen to get food for her boyfriend
No, it's an interrogative sentence, meaning, it asks a question. Declarative sentences make a statement: The movie starts at 4:30. The scissors are on the kitchen table. The cat has pooped on the stairs.
With her legendary skills in the kitchen, Mary's domesticity was not in question, but her fashion sense was.
When the kitchen's combined aromas assailed my senses, I was in heaven.
Formulate a sentence beginning with how, where, when, does, etc. and you have a question.
The 'sentence' is not a question, therefore there is no answer.
That is peculiar smell in the kitchen. I find it peculiar that Bob only speaks to rabbits.
When I entered the kitchen there was food everywhere!
If you are asking whether the words "Is this a question" make a complete sentence, yes-- but not a declarative sentence. They make a question, and they need a question mark at the end. A declarative sentence is just a statement of fact: "Yes, this is a complete sentence." But a question is where you ask someone about something: "Do you have any questions to ask me?"
there is a question here