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				 Watching children, particularly   they don’t know you are doing so, is really a pleasure.    A. as       B. while      C. when      D. since			【查看更多】
			


		
           
          


		
          
		
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          Watching children, particularly ________ they don't know you are doing so, is really a pleasure.

          1. A.
            as
          2. B.
            when
          3. C.
            while
          4. D.
            since
          

			
          
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          Watching children, particularly      they don’t know you are doing so, is really a pleasure.
               A. as       B. while      C. when      D. since
           
           
          

			
          
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          Watching children, particularly ________ they don't know you are doing so, is really a pleasure.
          

          [　　]
          


          

          A．a(chǎn)s
          B．since
          C．a(chǎn)fter
          D．that
          

          

          

          

			
          
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          Watching children, particularly ________ they don’t know you are
doing so, is really a pleasure.
          

          A．as
          

          B．when
          

          C．while
          

          D．since
          

           
          

          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          Watching children, particularly ________ they don’t know you are
doing so, is really a pleasure.
          

          A．as
          

          B．when
          

          C．while
          

          D．since
          

           
          

          

			
          
				查看答案和解析>>
			
          
		
          
						
          
				
          
	
          
	
          
		
          


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