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                题目内容
                (国家开放大学英语语法)
            
            
                They had ______ talked for half an hour __she entered.
A.hardly…when
B. scarcely…when
C.not…before
D.hardly…before
                    
                    
                    
                
                
                
            
        A.hardly…when
B. scarcely…when
C.not…before
D.hardly…before
参考答案