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          — Look at the problem!        it’s very difficult,        I have worked it out.
          — Good job.
          A．Although; /B．Because; so
          C．Because; /D．Although; but
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          

          解析試題分析：句意：看這道難題，雖然它非常難，但是我已經(jīng)算出來了。在英語(yǔ)中Because和so，although 和but,不能連用。根據(jù)句意，故選A。
          考點(diǎn)：考查連詞的用法。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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