Choose the best option to replace the underlined part to improve the given sentence.
If no substitution is required, select 'No substitution.'
My sister is very good at children.
Show answer & explanation
Correct answer: B
Explanation
The phrase 'good with' is the correct idiom used to describe having a talent for dealing with or caring for a particular type of person or animal (e.g., 'good with dogs,' 'good with numbers').
'Good at' usually precedes an activity (e.g., 'good at swimming').
'Good for' means beneficial to (e.g., 'exercise is good for children').