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                题目内容
                (甘肃开放大学 英语阅读1)
            
            
                They are not doing things on a regular _______(in a regular manner).
A.
basis
B.
base
C.
basement
D.
place
                
                    
                    
                    
                
                
                
            
        A.
basis
B.
base
C.
basement
D.
place
参考答案