Complete the detective's musings on a slightly absurd crime scene by choosing the appropriate question tag for each blank.

Everyone saw the giant penguin escape, didn't they?
Nothing about this case makes sense, does it?

Everyone saw the giant penguin escape, didn't they?

When using indefinite pronouns referring to people (like everyone, somebody, nobody), we use the plural pronoun "they" in the question tag. Since the statement is positive and in the past tense, the tag is negative (didn't they).

Nothing about this case makes sense, does it?

Indefinite pronouns referring to things (like nothing, something, everything) use the pronoun "it" in the tag. Because "nothing" makes the statement negative, the tag must be positive (does it).