Should the police have shot dally? The outsiders

Yes, the police were doing their job, they shot because Dally pointed a gun at them, and the police didn't know that he was only bluffing.

sing because that is what they are doing in the sentence

explanation:

the simple predicate is the main verb in the predicate that tells what the subject does. example: my father fixed the dryer. read each sentence. draw a line under the complete predicate.