問題詳情

11. While WHO is confident that Liberia has interrupted transmission of Ebola, outbreaks persist in neighboring Guinea andSierra Leone, creating a high risk that infected people may cross into Liberia over the region’s exceptionally ______borders.
(A) impermeable
(B) tight
(C) overpassing
(D) porous
(E) inapproachable

參考答案

答案:D
難度:困難0.25
統計:A(2),B(1),C(1),D(2),E(0)

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