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                题目内容
                (国家开放大学英语机考)
            
            
                - The trip ought not to take more than an hour. -_____________________. It is at least two hours. 
 
A、I guess so
B、You must be joking
C、It depends
                    
                    
                    
                
                
                
            
        A、I guess so
B、You must be joking
C、It depends
参考答案
 
                