12. Tensions continued but the opportunities to discuss and resolve them were improved by regular and closer
_____.
(A) vertex
(B) collaboration
(C) fracture
(D) circumference
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統計: A(15), B(90), C(9), D(32), E(0) #2064151
統計: A(15), B(90), C(9), D(32), E(0) #2064151