The security guards prevented the common people ______ entering the hall.
Show answer & explanation
Correct answer: B
Explanation
In English grammar, the verb prevent is typically followed by the preposition from when indicating that someone is being stopped from doing an action.
The standard structure is:
Prevent + [someone] + from + [verb-ing]
against: This is often used with "protect" (e.g., protect against), but not with prevent in this context.