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           It is worth considering what makes “convenience”foods so popular，and ______ better ones of your own．
            
           　　A．introduces　 　　　　B．to introduce
            
           　　C．introducing　　　　　D．introduced
          

			
          
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          It is worth considering what makes “convenience”foods so popular，and ______ better ones of your own．
            
           　　A．introduces　 　　　　B．to introduce
            
           　　C．introducing　　　　　D．introduced
          

			
          
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          When first _____ into the market, these products enjoyed great success.
            
          A. introducing　 B. introduced
            
          C. introduce　  D. being introduced 
              
           
          

			
          
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          Tom has always thought of himself as a good cook and never fails to _____everyone of it.
            
          A. remember   B. know  　　　　 C. introduce  　　　 D. remind.
              
           
          

			
          
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          When first ___________to the market, these products enjoyed great success.
            
          A.introducing　　　　　  B.introduced
            
          C.introduce　　　　　　  D.being introduced
              
           
          

			
          
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