Question

Fill in the blank with the most appropriate word.
The old lady thanked me _____ helping her across the street.

• A. with
• B. on
• C. about
• D. for

Answer 1

The correct option is D for

A preposition is a word which comes before a noun or a pronoun and establishes a relationship between the elements of a clause or words. The correct answer is option D) for as it indicates a purpose.

'With', 'on' and 'about' cannot be used here as they indicate inclusion of something, a position, and a piece of information respectively.

The old lady thanked me for helping her across the street.