The Governor demanded that all the proposals on May 1st.A. must be submittedB. be submitt

问题补充：

The Governor demanded that all the proposals on May 1st.

A. must be submitted

B. be submitted

C. submitted

D. were submitted

答案：

A. must be submitted

(答案→)B. be submitted

C. submitted

D. were submitted

解析：考查虚拟语气。根据句中demand要求，从句用should+ v原形的虚拟语气，should可以省略。句意：管理者要求所有的建议在5月1日提交。