Question 3: __________ fired once myself, I knew what to do to succeed in a new job interview.
How to omit the subject: When two clauses have the same subject, we omit the subject of one clause and change the verb to V-ing form if it is an active sentence, and V3 if it is a passive sentence.
A type, because after the verb “have” cannot be the adjective “fired”. D type because according to the above rule.
The correct answer is C. We use having done when we want to emphasize that the action happened before a past action