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          Never before______ so highly successful in his attempts to forecast the weather accurately on a small scale．

          1. A.
            man has been
          2. B.
            man is
          3. C.
            has man been
          4. D.
            will be man
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				C
          解析：
          （考查時態(tài)和倒裝句型。never置于句首時句子要倒裝。never before用于現(xiàn)在完成時，因此答案為C。）				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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