B. he pauses to listen for voices y because he wants to know who it is
        
                    
             
        
        
        
Languages change to accommodate cultural changes. they adapt to new technology. old words have new meanings.
        
             
        
        
        
Answer:
Complete sentence. 
Explanation:
It contains and independent subject, verb and expresses a complete thought.
 
        
             
        
        
        
Answer:
Under fire can mean many things.  Usually though, in the sense of a soldier, he is in combat and is being fired upon.
Explanation:
Getting shot at.  Under fire.
Do not confuse this with being under fire as being in trouble with someone.  Remember to take this from the perspective of the soldier in combat.