Which sentence correctly uses the preposition that follows ‘good’ when describing a skill?
AHe is good on mathematics.
BHe is good in mathematics.
CHe is good at mathematics.
DHe is good for mathematics.
Explanation
When describing skill or ability, the adjective ‘good’ is conventionally followed by the preposition ‘at,’ as in ‘good at swimming’ or ‘good at cooking.’ This is a fixed prepositional collocation, meaning native and correct usage pairs specific words together by convention rather than by strict logical rule. Preposition questions like this are extremely common in competitive English exams. Explore more English MCQs on mcqstutor to keep practicing.

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