Answer:
Not only did the cat eat the beef but also the chicken. or, The cat not only ate the beef but also the chicken. 
Explanation:
Personally, i like the second sentence better but i think both could work :)
 
        
             
        
        
        
I think its a predicate hope it helps
        
                    
             
        
        
        
I have not read the whole story, so I am not sure. But heres a helper: Exposition=intro Rising action=what happens after what starts the story Climax=when the conflict hits a turning point Falling action= the conflict being solved And the end= the conflict is finally solved
        
                    
             
        
        
        
This passage of dialogue IS WRITING CORRECTLY 
hoped this helped