Question

the student furnished me........ a copy of letter.

Answer 1

the student furnished me with a copy of letter

Answer 2

Answer :

This question is based on prepositions.

Cambridge English Dictionary defines "preposition" as " in grammar, a word that is used before a noun, a noun phrase, or a pronoun, connecting it to another word."

Cambridge English Dictionary defines "with" as "having or including something." This meaning is according to the context of the sentence.

So, the correct sentence is :

The student furnished me with a copy of letter.