Find the mistake: Our boss is worried about the upcoming meeting, so all this stuff should complete before noon.
Correct Answer: EASY
Knowledge: Passive sentence
Indication: due to “this stuff” action cannot be performed “complete”.
Passive sentences with modal verbs: S + should + be Ved/V3 + (by O).
Edit: complete => be completed
Our boss is worried about the upcoming meeting, so all this should be done before it happens.