He is good ______ mathematics.
Filling the Blank: Correct Preposition for 'Good'
The question asks us to choose the most appropriate preposition to complete the sentence: "He is good ______ mathematics." This involves understanding common prepositional phrases in English, specifically how the adjective 'good' is used.
Understanding Preposition Usage with 'Good'
The adjective 'good' is often followed by specific prepositions depending on the context:
- 'Good at' is used when referring to skills, abilities, or subjects. For example: She is good at playing the piano. He is good at solving puzzles.
- 'Good for' is used to indicate benefit or suitability. For example: This medicine is good for colds. Exercise is good for your health.
- 'Good with' is often used for dealing with people or things. For example: He is good with children. She is good with numbers.
- 'Good to' can indicate kindness or pleasantness. For example: Be good to your parents. It's good to see you.
Analyzing the Options
In the sentence "He is good ______ mathematics," we are talking about proficiency or skill in a subject (mathematics). Based on the rules above, the correct preposition to indicate skill in a subject is 'at'.
- by: This preposition usually indicates the means or agent (e.g., "written by him"). It doesn't fit here.
- to: This preposition indicates direction or purpose (e.g., "go to school"). It doesn't fit the context of proficiency.
- in: While 'in' can be used with subjects in other contexts (e.g., "He is interested in mathematics"), when describing someone's level of skill or ability using 'good', 'at' is preferred.
- at: This preposition correctly links the adjective 'good' with the subject 'mathematics', indicating skill or proficiency.
Conclusion
Therefore, the most appropriate preposition to fill in the blank is 'at', forming the phrase "good at mathematics".
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