Is this the repair shop where you fixed your TV? (-)
No, it isn't.
Is this the theater _________ you __________ a show?
where / saw
Is this the convenience store where you bought pizza? (+)
Yes, it is.
Is this the convenience ___________ where you __________ a snack?
store / bought
Is this the repair _______ where you fixed your computer?
shop
Is this the ___________ where you got a ckeck up?
dentist's