問題詳情
5. According to the World Health Organization, an Ebola epidemic________ can be declared over once 42 days have passed and no new cases have been detected.
(A) breakout
(B)outbreak
(C)breaking out
(D)broken out
參考答案
答案：A
難度：困難0.352941
統計：A(12),B(13),C(4),D(1),E(0)