Question

The officer demanded that such things ______from happening again.

A．prevented

B．prevent

C．be prevented

D．were prevented

Answer 1

C

试题分析：考查虚拟语气：句意：这个警官要求这样的事情要被阻止再次发生。主句的动词是demand，从句中用虚拟语气，谓语是should do，should可以省略，而且things和prevent是被动关系，选C。