Question

请问这题选什么，是A吗，最好解释一下哦

The teacher insisted that we all _____ in his office at one o’clock.
A. be B. to be C. would be D. must be

Answer 1

选A~ insist与suggest用法相似 意思是“坚持要”表示命令、要求，其后之宾语从句要用虚拟式动词原形
或者“should + 动词原形” 即 the teacher insisted that we all (should) be in his office at one o'clock。 我是英语师范专业的 相信我 关于2楼 已经有should了 哪里来的 would 怎么会有两个助动词~

Answer 2

应该是A

Answer 3

选C
insist后跟虚拟语气，should可省略