Multiple choice Directions: Change the voice of the given sentence. Who does not do his duty on time? By whom were his duty not done on time? By whom was his duty not done on time? By whom is his duty not done on time? By whom are his duty not done on time? None of these Reveal answer Fill a bubble to check yourself C Correct answer Explanation 'Does' changes to 'is' in the passive sentence. 'Who' changes to 'by whom'.