You can often tell what a word means by its context in a sentence.
        
             
        
        
        
Answer:
B.  A faster pace would have been more appropriate for the speech’s content and audience.
Explanation:
Mateo is speaking to the audience and refers to the audience as US indicating he is talking to fellow students about the injustice of the strict snow days. 
Children are more likely to get bored listening to a talker with a professional tone or if the speaker is being more casual then the audience would think the speech is not important allowing the audience to miss the speech before it has even begun. 
But by making the speech faster you are allowing the audience to begin to believe on their own about the injustice and it begins to work up their blood pressure. 
Hitler was very good at getting the people to believe in what he wished because he made his speeches short and fast. 
 
        
             
        
        
        
Answer:

Explanation:
Nancy only believes that her brother is in Paris. Even if he is in Paris or he is not, Nancy cannot know for sure.
 
        
                    
             
        
        
        
Answer:
???? Explanation book where?
Explanation:
 
        
             
        
        
        
Answer:
Compete
Explanation:
I am assuming "complete" was a typo and that the word "compete" is what you meant. In this case, compete is an active voice vers, because it is a verb that a subject is performing.
Active voice verbs are the opposite of passive voice verbs. Passive voice verbs are verbs that are done to the subject, as opposed to the subject doing them.