Piece together the office gossip's dramatic retelling of the stolen sandwich incident by choosing the correct words for each gap.

"We have a lunch thief on the loose! Which coworker stole the boss's legendary turkey sandwich?"

"Wait, there were two identical turkey sandwiches in the fridge! Which one did they take?"

"Which coworker stole the boss's legendary turkey sandwich?"

This is a subject question. The phrase "Which coworker" is the subject doing the stealing. We use the past tense verb ("stole") directly, with no auxiliary verb.

"Which one did they take?"

This is an object question. The subject is "they" (the thief), and "Which one" is the object being taken. Because we are asking about the object, we need the auxiliary verb "did" before the subject.