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				This robot is supposed to save a lot of labor, but it remains a problem if it       .     A. is   B. saves   C. does   D. has			【查看更多】
			


		
           
          


		
          
		
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          This robot is supposed to save a lot of labor, but it remains a problem if it ______.
            
              A. is B. saves C. does D. has
          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          This robot is supposed to save a lot of labor, but it remains a problem if it ______.
            
              A. is B. saves C. does D. has
          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          This robot is supposed to save a lot of labor, but it remains a problem 
            
          if it ______. 
            
           A. is B. saves C. does D. has
          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          


          This robot is supposed to save a lot of
labor, but it remains a problem if it ______.
          


          
 
          
  
  
          A．is
          
            		
  
  
          B．saves
          
            		
  
  
          C．does
          
            		
  
  
          D．has
          
            		
 
          

          


           
          

			
          
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          This robot is supposed to save a lot of labor, but it remains a problem if it ______.

          1. A.
            is
          2. B.
            saves
          3. C.
            does
          4. D.
            has
          

			
          
				查看答案和解析>>
			
          
		
          
						
          
				
          
	
          
	
          
		
          


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