Who killed the bird? The correct passive form of the sentence is —-.
Who was killed by the bird?
Who was killed the bird?
By whom the bird was killed?
By whom was the bird killed?
Explanation:
Correct Answer is: By whom was the bird killed?

Who was killed by the bird?
Who was killed the bird?
By whom the bird was killed?
By whom was the bird killed?
Correct Answer is: By whom was the bird killed?

The Word `vital` is a/an- Option A: noun , Option B: adverb , Option C: adjective, Option D: verb, correct answer is: adjective
Light the oven now. Which parts of speech is the bold word? Option A: Verb , Option B: Adjective , Option C: Adverb, Option D: Subject, correct answer is: Verb
Our blessings come from above. The underlined word is - Option A: Verb , Option B: Adjective , Option C: Adverb, Option D: Noun, correct answer is: Noun
`He (completely) forgot about the video.` The bracketed word is- Option A: Pronoun , Option B: Adjective , Option C: Adverb, Option D: Noun, correct answer is: Adverb
`Life is a walking shadow`. Here `walking` funcions a/an- Option A: noun , Option B: adjective , Option C: verb, Option D: adverb, correct answer is: adjective