Fill in the blank with the correct preposition: ‘They congratulated him ___ his success.’

Explanation

The verb ‘congratulate’ is conventionally followed by the preposition ‘on’ when specifying the achievement being celebrated, as in ‘congratulated him on his success’ or ‘congratulated her on passing the exam.’ This fixed collocation is frequently tested and easily confused with ‘for,’ which is not the standard preposition used with ‘congratulate.’ Explore more English MCQs on mcqstutor to keep practicing.