Fill each gap with the most appropriate option from the list provided. My classmate _____ I haven't seen for years, wrote to me last week?

Fill each gap with the most appropriate option from the list provided.

My classmate _____ I haven't seen for years, wrote to me last week?

Answer Details

The correct option to fill the gap is "whom". "Whom" is used as the object of a verb or preposition, and refers to the person being acted upon. In this sentence, the classmate is the object of the verb "have not seen", and therefore "whom" is the appropriate pronoun to use.