详解1.The teacher demanded that the exam ----- before eleven.

本题答案C考点：宾语从句中的虚拟语气宾语从句,指主语+某些动词+that+从句主语+should+动词原形+……。从句中的should可省略。这些动词包括：ask, advise, beg, command,demand,desire,insist,order,propose,request, suggest,表示命令、建议、愿望、坚持等。例：I propose that we(should)move to the new house next week。我建议我们下个星期搬进新家。The professor suggested that the meeting(should)be canceled。教授建议取消会议。