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


		
           
          


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

			
          
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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．as soon as
          

          

          C．since
          

          

          D．while
          

          

          

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

          

          [　　]
          

          A．

          before
          

          

          B．

          as soon as
          

          

          C．

          since
          

          

          D．

          while
          

          

          

			
          
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