Q. I'm good . . . . . . . . singing.
✅ Correct Answer: (A)
at
Explanation: 'Good at' is a particular idiomatic expression which means you have good skills in doing something. Hence it makes the sentence meaningful.
Explanation by: Team MCQ Buddy
'Good at' is a particular idiomatic expression which means you have good skills in doing something. Hence it makes the sentence meaningful.