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                题目内容
                (河南城建学院-大学英语2)
            
            
                It ______ exactly thirty years since I graduated from college.
A.was
B.has been
C.will be
D.had been
                    
                    
                    
                
                
                
            
        A.was
B.has been
C.will be
D.had been
参考答案