Who had done the work? The correct passive voice of this sentence is :
By whom the work had done?
By whom had the work done?
By whom had the work been done?
Who the work had been done?
Explanation:
Correct Answer is: By whom had the work been done?

By whom the work had done?
By whom had the work done?
By whom had the work been done?
Who the work had been done?
Correct Answer is: By whom had the work been done?

Each boy will get a prize. Here `each ` is a/an__ . Option A: noun , Option B: pronoun , Option C: pronoun, Option D: adjective, correct answer is: adjective
She got a letter typed. The underline word is a- Option A: adverb , Option B: adjective , Option C: verb, Option D: interjection, correct answer is: adjective
When I am not in hurry, I walk extremely slowly- Option A: Noun , Option B: Adjective , Option C: Verb, Option D: Adverb, correct answer is: Adverb
We felt very tired. The word `tired` used in the sentence is ______ Option A: none , Option B: adjective , Option C: noun, Option D: verb, correct answer is: adjective
Correct adjective of the world -`contempt`-is- Option A: Contempting , Option B: Contemptible , Option C: Contemptable, Option D: Contemptation, correct answer is: Contemptible