Change the following sentences into active voice. (Past Tenses)
(i) The watch was lost by my mother.
Active Voice: My mother lost the watch.
(ii) An essay was written by him.
Active Voice: He wrote an essay.
(iii) Penicillin was discovered by Alexander Fleming.
Active Voice: Alexander Fleming discovered Penicillin.
(iv) The burglar was arrested by the police.
Active Voice: The police arrested the burglar.
(v) Was the bell rung by a boy?
Active Voice: Did a boy ring the bell?
(vi) By whom was this letter written?
Active Voice: Who wrote this letter?
(vii) Why was such a letter written by your brother?
Active Voice: Why did your brother write such a letter?
(viii) Football was being played by them.
Active Voice: They were playing football.
(ix) The students were being taught by her.
Active Voice: She was teaching the students.
(x) My purse had been stolen by somebody.
Active Voice: Somebody had stolen by purse.