Select the most appropriate option to fill in the blank.
They congratulated him _______ winning the match.
Show answer & explanation
Correct answer: C
Explanation
In English, the verb congratulate is followed by the fixed preposition on when expressing praise for a specific achievement or occasion. While "for" is common in casual speech, "on" is the grammatically standard choice for formal exams and structured English.
Correct Sentence: They congratulated him on winning the match.