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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(shí)態(tài)。句意：專家們?cè)诮煌▎栴}上花了整整一年的時(shí)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(shí)，且spend發(fā)生在came之前，因此從句的時(shí)態(tài)是過去完成時(shí)。故選A項(xiàng)。
    				
    
							
    
			
    
			
    
			
			
    
		
    
	
    

		
    

		





			
    
		
    
		
				
    
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