Question

They will fight ____ the last man.(fill up with an appropriate word)

Answer 1

your answer is
'to'
....... hope it help u

Answer 2

Answer:  

They will fight to the last man.

Explanation:

The blank should be filled with a preposition as prepositions are generally used for connecting two sentences in a single sentence giving a compound meaning. In the given sentence, the statement “They will fight” will be giving an incomplete meaning keeping a question at the end as with whom they will fight? So the complete meaning stating that they will be fighting their enemies’ up to the last person alive in his or their team will be conveyed only by using the preposition “to” in the blank space.