問題詳情

18. When only a few sellers ____, a situation of monopoly will take place.
(A) being in close competition
(B) to be in close competition
(C) are in close competition
(D) in close competition

參考答案

答案：C
難度：非常困難0
統計：A(0),B(1),C(10),D(6),E(0)