The passive form of `Who has done the work?` is –
Who has been done the work?
By whom has the work been done?
By whom has been done the work?
Whom has done the work by?
Explanation:
Correct Answer is: By whom has the work been done?

Who has been done the work?
By whom has the work been done?
By whom has been done the work?
Whom has done the work by?
Correct Answer is: By whom has the work been done?

`Please come in` the underlined word in the sentence function as- Option A: a noun , Option B: an adverb , Option C: a preposition, Option D: an adjective, correct answer is: an adverb
Which of the following is not a noun? Option A: Friendliness , Option B: Softly , Option C: Livelihood, Option D: Responsibility, correct answer is: Softly
`I shall help you provided you obey me.` Here the underlined word is a/an- Option A: adverb , Option B: adjective , Option C: conjunction, Option D: verb, correct answer is: conjunction
What is the adjective form of `star` ? Option A: Stary , Option B: Starry , Option C: Asterisk, Option D: Starful, correct answer is: Starry
The verb form of word `social` is- Option A: Society , Option B: socialize , Option C: sociology, Option D: societal, correct answer is: socialize