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				2．A．do     B．does      C．to do         D．doing			【查看更多】
			


		
           
          


		
          
		
          題目列表(包括答案和解析)
          

		
		
          

          


          
	
          				
          
									
          Betty doesn’t often ________ her work at
home.
          


          
 
          
  
  
          A．do
          
            		
  
  
          B．does
          
            		
  
  
          C．to do
          
            		
  
  
          D．doing
          
            		
 
          

          


           
          

			
          
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          I'm trying ________ well in my lessons.
          

          [　　]
          

          

          A．do
          B．does
          C．to do
          D．doing
          

          

          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          

          I'm trying ________ well in my lessons.
          

          [　　]
          

          

          A．do
          B．does
          C．to do
          D．doing
          

          

          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          Tony is busy _______ his homework.
          


          
 
          
  
  
          A．doing
          
            		
  
  
          B．do
          
            		
  
  
          C．to do
          
            		
  
  
          D．does
          
            		
 
          

          


           
          

			
          
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          Tony is busy _______ his homework.
          


          
 
          
  
  
          A．doing
          
            		
  
  
          B．do
          
            		
  
  
          C．to do
          
            		
  
  
          D．does
          
            		
 
          

          


           
          

			
          
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