問題詳情
【題組】48. It seems to be a wise decision to have brought wolves back to Yellowstone because ____.
(A) wolves can depend on themselves to find food
(B) a national park should introduce foreign animals
(C) a national park should have different kinds of animals
(D) wolves are necessary for many other animals and plants to live
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)