Answer: shouldn't
Explanation:
Since he felt sick after eating. "I shouldn't have eaten so much." is the correct sentence. 
 
        
                    
             
        
        
        
Answer:
Dear Sam,
Mrs. Anna's class and I were going to the local zoo when something unusual happened. We had just gotten done eating some food at the café and some girls wanted to go look at the dusk monkeys. Anyways, we're all looking at monkeys when we see a tiger. Well, yes its a zoo you see animals all the time. But this Bengal tiger was out of its cage. It also had a chicken in its mouth. This Bengal Tiger was also loose. Everyone in the class including Mrs. Anna started freaking out because they thought the tiger was going to eat them too or something. A few minutes later, zoo keepers came by and shot the tiger with a tranquillizer and hauled it back to its cage. Apparently a section of the cage had a space big enough for Cassie the tiger to get out. We're all safe now! 
Can't wait to see you soon, ___ 
 
        
             
        
        
        
The correct answer among all the other choices is A)We cannot do as much as the soldiers have done. This is the best paraphrase of this quotation from Abraham Lincoln's Gettysburg Address. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.