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          How can the water __________ vapour? 

          A. became
          B. become
          C. becoming
          			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				B				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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				科目：小學(xué)英語
				來源：同步題
				題型：單選題
			
          
									
          How can the water ____________ vapour? 
          

          [     ]
          A. became
          B. become
          C. becoming
          

			
          
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