問題詳情
4. These four countries are _______ on the brink of humanitarian catastrophe, with skyrocketing poverty and an economic implosion that threatens to throw these countries into even deeper turmoil.
(A) teetering
(B) truncating
(C) taunting
(D) tallying
參考答案
答案：99
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中