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?

What is the verb form of the word `ability`? Option A: capable , Option B: inability , Option C: enable, Option D: unable, correct answer is: enable
The board meeting was called ___ due to the sudden demise of the CEO. Option A: down , Option B: off , Option C: shut, Option D: closed, correct answer is: off
What is the correct part of speech of the underlined word?He was never the wiser for his experience. Option A: Pronoun , Option B: Adjective , Option C: Adverb, Option D: Verb, correct answer is: Adverb
Did you ever `return` the video? The underlined/quoted word is- Option A: verb , Option B: adverb , Option C: noun, Option D: adjective, correct answer is: verb
Choose the adjective form of the word `sun`- Option A: sunner , Option B: lunar , Option C: solar, Option D: shiny, correct answer is: solar