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          The world's population is getting larger and larger, so scientists are trying to _______ new ways to solve the food problem.
            
          A．catch up with          B．keep up with       C．come up with         D．make up with
            
            
         
        
         			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				  
            
          1、C
            
            				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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          The world’s population is getting larger and larger, so scientists are trying to ______ new ways to solve the food shortage.
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				題型：
			
          
									
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從方框中選擇合適的短語，并用其正確形式填空。 
          

          


          


          


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