54. The ______ of the Amur tiger in Russia is especially vexing because the animal had been considered such a conservation success story.
(A) increase
(B) decline
(C) reserve
(D) capture
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統計: A(55), B(132), C(42), D(32), E(0) #79681
統計: A(55), B(132), C(42), D(32), E(0) #79681