Question : Find out the part which contains an error of subject-verb agreement:
More than one documentary on moral values and knowledge by this director have been banned by the censor board.
Option 1: More than one documentary on moral values
Option 2: have been banned
Option 3: No error
Option 4: and knowledge by this director
Option 5: by the censor board
Correct Answer: have been banned
Solution : The subject (one) is singular. Thus, has should be written