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                18.  (单选题) – I’m afraid I have to say goodbye to you.–________.( )(本题4.0分)
A、 I’m sorry.
B、 That’s all right.
C、 Never mind.
D、 See you.
                    
                    
                    
                
                
                
            
        A、 I’m sorry.
B、 That’s all right.
C、 Never mind.
D、 See you.
参考答案
 
                