Choose the correct preposition: 'She is good ___ mathematics.'

Answer and explanation

Correct answer: D. at

  1. Step 1: The adjective 'good' pairs with 'at' for skills. Step 2. 'Good at' is correct. Answer: at. Why not the others: 'in', 'on' and 'for' do not collocate with 'good' here.

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