........You guys are all picking the easy ones.
Where my mind gets hung up for a second is in sentences like:
What does they want to eat tonight?
What is (or is it are?) they doing next Saturday?
What do they want to eat?
What does [name] want to eat?
What do you want to eat?
What are they doing?
What is [name] doing?
What are you doing?
Seems like you're hung up on not understanding grammar.