Was the story being written by him?

Is he writing the story?

Was he writing the story?

Did you write the story?

Do you write the story

All of the above

Explanation

Active sentences in the past continuous tense have the following structure:
Subject + was/were + -ing form of the verb + object
Passive sentences in the past continuous tense have the following structure:
Object of the active sentence + was/were + being + past participle form of the verb + by + subject of the active sentence