Choose the correct sentence:
A. She is proficient with data analysis tools.
B. She is proficient in data analysis tools.
C. She is proficient at data analysis tools.
D. She is proficient on data analysis tools.
E. She is proficient for data analysis tools.
- She is proficient with data analysis tools.
- She is proficient in data analysis tools.
- She is proficient at data analysis tools.
- She is proficient on data analysis tools.
- She is proficient for data analysis tools.
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Answer: B official key
Approach: Fixed preposition after an adjective.
Solution: 'Proficient' is followed by 'in' (proficient in English, proficient in data analysis). B: 'She is proficient in data analysis tools.' — correct.
Why the other options are wrong:
A: 'proficient with' — not the standard collocation.
C: 'proficient at' goes with activities (proficient at analysing data); with a field or tools the standard pair is 'in'.
D: 'proficient on' — incorrect.
E: 'proficient for' — incorrect.
Cetking shortcut: Learn the pair: proficient in, adept at, skilled in.
Answer: B