Select all that apply. Which sentences have correctly formed question tags?
The trainees understood, didn't they?✓Bonne réponse
Everything is labelled, aren't they?
Let's review the map, shall we?✓Bonne réponse
Nothing was missing, was it?✓Bonne réponse
Explication
The correct tags reverse polarity, match the available auxiliary, and use the suitable pronoun or fixed special form. The faulty example treats everything as plural even though its standard tag pronoun is it.