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          基本語法 。
          1. When he was five, he_________(begin) to  read  and write．
          2. If you ask him,he_______(help) you.
          3. When water________(become) gas,we call it steam.
          4. We________(have)a ball game if it is fine tomorrow.
          5. As soon as water boils,it________(change) into vapour  little by litle.
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          .l. began   2. will help   3. becomes   4. will have   5. will be changed
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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