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				 ―When did you become a volunteer?  ―Two years ago. I                this group since then.  A. have joined in   B. have joined to  C. have been in   D. have been to			【查看更多】
			


		
           
          


		
          
		
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          —When did you become a volunteer? 
          —Two years ago. I _______ this group since then. 
          

          [     ]
          A. have joined in 
          B. have joined to 
          C. have been in 
          D. have been to 
          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          — When did you become a volunteer?
          — Two years ago. I _____this group since then.
          

          [     ]
          A. have joined in
           B. have taken part in
           C. have been in
           D. have been to 
          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          — When did you become a volunteer?
          — Two years ago. I _____ this group since then. 
          

          [     ]
          A. joined 
          B. have joined 
          C. have been in 
          

			
          
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          --When
did you become a volunteer for the elderly?
          


          --
Two years ago. I        this group
since then.
          




          
 
          
  
  
          A.
  joined
          
            		
  
  
          B.
  took part in
          
            		
  
  
          C.
  have joined
          
            		
  
  
          D.
  have been in
          
            		
 
          

          




           
          


           
          

			
          
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          --When did you become a volunteer for the
elderly?
          


          -- Two years ago. I ______ this group since
then.
          


          
 
          
  
  
          A．joined
          
            		
  
  
          B．took part in
          
            		
  
  
          C．have joined
          
            		
  
  
          D．have been in
          
            		
 
          

          


           
          

			
          
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