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				Science and  technology have     in important ways to the improvement of agricultural  production.A.    attached     B.  assisted     C.  contributed    D. witnessed[解析]C本題考查動詞短語.contribute to  means: 促成,有助于,對...有貢獻(xiàn).in important ways放在contribute to 之間.增加了題目的迷惑性.			【查看更多】
			


		
           
          


		
          
		
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           Science and technology have ____in important ways to the improvement of agricultural production.
            
          A.     attached  B. assisted  C. contributed  D. witnessed
          

			
          
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          Science and technology have ____in important ways to the improvement of agricultural production.
            
          A.     attached  B. assisted  C. contributed  D. witnessed
          

			
          
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          .Science and technology have ____in important ways to the improvement of agricultural production.
            
          A.attached         B. assisted         C. contributed        D. witnessed
          

			
          
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