6 A: Did you go to the gallery opening? B: No, we (not/invite).

Explanation: The question is in the past simple. The answer refers to a past event where the subject ('we') did not receive the action. This requires the past simple passive. The structure is 'was/were + past participle'. Since 'we' is plural, we use 'were'. We also need to include 'not'. The past participle of 'invite' is 'invited'.

Answer: No, we were not invited.