Complete the hungry roommate's shocked complaint.

"You ate the last slice?! _____ the giant sticky note I left on the pizza box?"

The correct answer is Didn't you see.

We often use negative questions to express surprise or disbelief. When we use contractions, n't attaches to the auxiliary verb and comes before the subject (Didn't you see...?).

If we don't use a contraction, not must come after the subject (Did you not see...?), but the contracted form is much more common in conversation!