(·重庆)It is still under discussion the old bus station should be replaced with a moder

问题补充：

(·重庆)It is still under discussion the old bus station should be replaced with a modern hotel or not.

A. whether

B. when

C. which

D. where

答案：

(答案→)A. whether

B. when

C. which

D. where

解析：考查主语从句的引导词。句意：这个旧汽车站是否应该被一个现代化的旅馆取代还在讨论之中。本句中的It是形式主语，真正的主语是从句“whether the old bus station should be replaced with a modern hotel or not”。whether在句中引导主语从句。