【单选题】There has been a ______ lack of communication between the union and the management.
                    
A.regretful
B.regrettable
C.regretting
D.regretted
                
							【单选题】There has been a ______ lack of communication between the union and the management.
                    
A.regretful
B.regrettable
C.regretting
D.regretted
                
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