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				43．A．While         B．As soon as       C．Before          D．Since			【查看更多】
			


		
           
          


		
          
		
          題目列表(包括答案和解析)
          

		
		
          

          


          
	
          				
          
									
          He met many problems ______ he was going
over his lessons.
          


          
 
          
  
  
          A．before
          
            		
  
  
          B．a(chǎn)s soon as
          
            		
  
  
          C．since
          
            		
  
  
          D．while
          
            		
 
          

          


           
          

			
          
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          He met many problems           he
was going over his lessons.
          


          
 
          
  
  
          A．before 
          
            		
  
  
          B．a(chǎn)s soon as 
          
            		
  
  
          C．since 
          
            		
  
  
          D．while
          
            		
 
          

          


           
          

			
          
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          He met many problems           he
was going over his lessons.
          


          
 
          
  
  
          A．before 
          
            		
  
  
          B．a(chǎn)s soon as 
          
            		
  
  
          C．since 
          
            		
  
  
          D．while
          
            		
 
          

          


           
          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          He met many problems           he was going over his lessons.
          A．before B．a(chǎn)s soon as C．since D．while
          

			
          
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          He met many problems            he was going over his lessons.
          A．before 
          B．a(chǎn)s soon as 
          C．since 
          D．while
          

			
          
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