The word that could fit the gap is definitely a possessive pronoun such as their, used because it refers to the previous pronoun them
Pretty sure it is 'looks'. You can't guard duty or along. You can look at something, though.
Hope this helps!
Answer:
O’Brien has been at war for only four days when the platoon is fired on by a village near the South China Sea. Cross orders an air strike and the platoon watches the village burn. Dave Jensen pokes fun at a dead old man whose right arm has been blown off and encourages O’Brien to do the same, to “show a little respect for your elders.” O’Brien refuses, and Kiowa tells him he’s done the right thing. He asks if the old man was O’Brien’s first experience with a dead body, and O’Brien says no, thinking of his first date, Linda.
Explanation:
