問題詳情

【題組】36.()These pioneers were faced with ________ challenges in the past.
(A)a school of
(B)what on earth
(C)more than
(D)a series of

參考答案

答案：D[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(1),D(6),E(0)