They have demanded that all the facts known to the public.
A. make
B. are made
C. be made
D. should make
网友回答
A. make
B. are made
(答案→)C. be made
D. should make
解析：考查虚拟语气：句意：他们要求所有的事实要让公众知道。主句的谓语是demand的时候，宾语从句的谓语用虚拟语气，should do，should可以省略，还有facts和make是被动关系，选C。