Question

complete the sentence with the best relative pronoun.
sergeant mike sherman is still close to his fellow soldiers, he spent many years with in the military.

Explanation:

The relative pronoun "whom" is used here because it refers to the object of the preposition "with" (the fellow soldiers) and is appropriate for referring to people in a non - subject role in the relative clause. "Who" is used for subjects, "which" for non - human things, and "that" is less common in non - restrictive relative clauses (the clause here is non - restrictive as it is set off by commas) when referring to people in an object position. So "whom" is the best choice.

Answer:

whom