Answer:
1. Mira since began to play the piano when she was a child
2. My learned sister started learning Japanese last May
3. His cousin last went for shopping 2 weeks ago
4. The last time he has not met me was in 2009
6. I don't understand option
7.
 
        
             
        
        
        
Thoreau lived on Emerson's land, which was the subject of one of his books. 
 
        
                    
             
        
        
        
Answer:
"and this overload of stimulus could be altering the way their brains are getting wired."
 
        
             
        
        
        
Answer: A.) The downfall of the main character.
Explanation: nice face.
 
        
             
        
        
        
C. I found a bag of marbles.
This is the only sentence that contains an indefinite article. Indefinite articles are "a" and "an" for singular nouns. "some" is the indefinite article used for plural or uncountable nouns.
"the" is a definite article.