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.
A
whose
B
which
C
that
D
whom
Verified Correct Answer: D.
Grammar & Contextual Explanation
Whom is used because it functions as the object of the verb phrase “haven't seen.” “My classmate” is the noun being described by the relative clause.
Source: Myschool Past Questions Archive (Record #11690)