Question

______ in the school regulation that students shouldn’t use cell phones in the campus．

A．What requires B．What is required C．It requires D．It is required

Answer 1

______ in the school regulation that students shouldn’t use cell phones in the campus
A．What requires B．What is required C．It requires D．It is required
选项是D
It是形式主语，真正的主语是that students shouldn’t use cell phones in the campus从句。

Answer 2

你好，很高兴为你解答。
保证正确率~！
正确答案是：D
【解析】：
这里 It 是形式主语 ， is required 是谓语， in the school regulation 是介词短语作状语，that 后面的才是真正的主语。
规定是“被规定”，require 和 regulation 存在动宾关系，即是被动关系。故A、C 都是错误的，如果选B，句子都没有谓语。要在 that 前面加一个 is 才可以。即是：
What is required in the school regulation is that students shouldn’t use cell phones in the campus
在这里的话：What is required in the school regulation 是 what 引导的主语从句。
【翻译】：学校规定，在校园里面学生们不准使用手机。
不懂请追问，(*^__^*) 嘻嘻~~
望采纳，祝开心~！！！

Answer 3

答案选B．What is required
【翻译】学校关于老师不能在课堂上使用手机的规定经常被忽视。

Answer 4

D．It is required

Answer 5

D, it is required