問題詳情
【題組】20. The high speed rail system in China has experienced _____ growth which no otherinfrastructure programs in the world have ever seen so far.
(A) adequate
(B) prototypical
(C) unprecedented
(D) prolonged
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(2),D(0),E(0)