問題詳情

32. Pacific Northwest forests consist of a wide variety of trees and underbrush, which be constantly evolving.

(A)consist of
(B)a 
(C)underbrush
(D)be
(E)constantly

參考答案

答案：D
難度：適中0.5
統計：A(2),B(3),C(1),D(11),E(3)