Would "he looked back." be considered a truncated sentence?

What is the main theme reflected in this excerpt from "ulysses" by alfred, lord tennyson?

How do i can change this sentence : a modern physician in a small town not only is proficient in general medicine but surgery as well. to parallel structure?

On what evidence did you base your predictions? check the four boxes that apply. there is a rope around his neck. he is in alabama. his hands are tied behind his back. he is standing high above a river. the bridge is for railroads. some crimes are punished by hanging.