Q1. Choose the most appropriate passive form of the given sentence: People must not leave bicycles in the hall.
A Nobody should leave bicycles in the hall.
B Bicycles must not be left in the hall. Correct
C The bicycles are not to be left in the hall by the people.
D The hall must not have any bicycles of people.
Explanation
The passive voice must make the object of the active sentence, bicycles, the subject of the new sentence, and it must preserve the modal force of must not. “Bicycles must not be left in the hall” does both correctly. “Nobody should leave bicycles in the hall” remains active and weakens must to should. “The bicycles are not to be left in the hall by the people” is awkward and changes the modal structure. “The hall must not have any bicycles of people” changes the meaning and is not a proper passive form.