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          He has made many friends, _____ is helpful to him when he is in trouble.

          A. which
          B. who
          C. it 
          D. that 
          			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				A				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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