Ziweilu gourmet leisure bar

Sit down = sit down, sit down

(Item A, is+ past tense (sat) is not the correct tense or voice)

(item d, there is no such way to sit. In addition, sitting is an intransitive verb, so there is no passive voice. )

(item c, seat is a noun)

So ACD is incorrect.

If everyone is seated, let's start the class!