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          【題目】After the experts ________ a whole year on the traffic issue, they finally came to a solution.
          A.had spentB.were spendingC.have spentD.would spend
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          【答案】A
          【解析】
          考查時態(tài)。句意：專家們在交通問題上花了整整一年的時間，最后終于找到了解決辦法。根據(jù)they finally came to a solution可知主句是一般過去時，且spend發(fā)生在came之前，因此從句的時態(tài)是過去完成時。故選A項。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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