Choose the correct preposition: "She is very good ___ mathematics."
Correct answer: B. at
- A. in
- B. at
- C. on
- D. for
Explanation
English uses "good at" for skills and subjects — good at mathematics, good at cricket. "Good in" is used for a context or period rather than a skill, and "good for" means beneficial.
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About Prepositions
Prepositions link a noun or pronoun to the rest of the sentence, showing place, time, direction or relation. The difficulty is idiomatic rather than logical: English fixes particular prepositions to particular verbs and adjectives, so “good at,” “married to” and “differ from” have to be learned as units rather than reasoned out.
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