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57.(  )

What does the author think of the role of music?

• A、It is important for dealing with social crises.
  
  

• B、It may offer children future job opportunities.
  
  

• C、It is fundamental to the growth of a child.
  
  

• D、It can help children learn core subjects.
  
  

Why do dogs wear a guilty look according to the researchers?

• A、To attract their owners
  
  

• B、To deceive ther owners.
  
  

• C、To beg their owners for treats.
  
  

• D、To show obediene to their owers.