問題詳情

30.Scientists were able to conclude that modem humans__________in Africa twice as long asanywhere else.
(A) have lived
(B) must have lived
(C) had lived
(D) were living

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)