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				16．More and more people have realized we won’t  have cleaner water to drink unless something          soon．A．was done        B．will be done      C．to be done       D．is done			【查看更多】
			


		
     
    


		
    
		
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    More and more people have realized we won’t have cleaner water to drink unless something ________ soon．

    1. A.
      was done
    2. B.
      will be done
    3. C.
      to be done
    4. D.
      is done
    

			
    
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    More and more people have realized we won't have cleaner water to drink unless something ______ 
    soon.
    

    [     ]
    A. was done      
    B. will be done     
    C. to be done     
    D. is done
    

			
    
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    More and more people have realized we won't have cleaner water to drink unless something ______ soon.
    

    [     ]
    A. was done 
    B. will be done 
    C. to be done 
    D. is done 
    

			
    
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    More and more people have realized we won’t have cleaner water to drink unless something______ soon．
      
    A．is done          B．will be done          C．to be done            D．was done
    

			
    
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    More and more people have realized we won’t have cleaner water to drink unless something
      
                soon.
      
    A．was done         B．will be done      C．to be done       D．is done
    

			
    
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