2 Health officials warn that a _______ is threatening the forests through particular animals and insects.
(A) plague
(B) plunge
(C) plateau
(D) plethora
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統計: A(44), B(7), C(8), D(10), E(0) #3564514
統計: A(44), B(7), C(8), D(10), E(0) #3564514