Question

Fill in the blank with the most appropriate word.
I congratulated all my classmates ___ passing the exam.

• A. at
• B. with
• C. on
• D. in
• E. within

Answer 1

The correct option is C on

Option "C" is the correct answer.

EXPLANATION:

A preposition is a word used to link nouns, pronouns , or phrases to other words within a sentence.

In the first blank, preposition "on" will be used because preposition "on" is used to indicate a reference on something. In the given sentence, the speaker is giving reference to 'congratulating the classmates'.