阿摩線上測驗
4. The primitive tribe's mysterious rituals have remained ________ for centuries, despite many comprehensive studies by modern anthropologists.
(A) pulchritudinous
(B) complacent
(C) enigmatic
(D) prudent
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統計： A(0), B(1), C(19), D(1), E(0) #3868471
統計： A(0), B(1), C(19), D(1), E(0) #3868471
