Active: I was writing a letter. Passive form is
AA letter was being written by me
BA letter is being written by me only
CA letter had been written by me only
DA letter will be written by me only
Answer & Solution
Correct answer: A. A letter was being written by me
1. Past continuous passive: was/were being + V3.
2. Subject 'A letter' takes 'was being'.
3. Hence option A.
_Source: jkchrome.com SSC Active-Passive Voice PDF (Mistral OCR), Past Continuous Tense passive_
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