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          Why not ______ your teacher for help when you can’t    finish ______ it by yourself?
          A．a(chǎn)sk; writeB．to ask; writing
          C．a(chǎn)sk; writingD．a(chǎn)sking; write
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          考查固定搭配。Why not do sth.為什么不做某事；finish doing sth.做完某事。所以選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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