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          —How long do you think it will be______ man can finally solve the problem of cancer?
          —Well，it depends
          A．whenB．untilC．a(chǎn)fter D．before
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：考查連詞：句意：你認(rèn)為還要多久人才能最終解決癌癥的問題。--那要看情況而定了。這句話用了It will be+一段時間+before從句，意思是“還要多久…才/就….”，選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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