問題詳情

18. The key players in the energy market, ____________ heavy capital investment, have little interest in innovation.
(A)which to require 
(B)requiring 
(C)which it requires 
(D)required

參考答案

答案：B
難度：適中0.622222
統計：A(9),B(84),C(12),D(15),E(0)