You really _______ smoking. It's so bad for you.
-
should give up
-
ought to give up
-
must give up
-
Any of the above
D
Correct answer
Explanation
All three options are correct for giving strong advice. 'Should' and 'ought to' mean the same thing (strong recommendation), and 'must' expresses strong obligation or necessity. Therefore 'Any of the above' is correct.