The correct answer is "What other pain must I suffer through as I get older?"
Explanation: In Act V, scene iii, Montague is mourning the death of his wife, who passed away due to sadness of their son's exile. He has lost so much, and he wonders what more could he suffer in his old age.
Explanation: The subject or who is performing the action is not clear and in an active sentence, there is importance placed on the person who is performing the action.
