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

问题描述:

______ in the school regulation that students shouldn’t use cell phones in the campus.
A.What requires B.What is required C.It requiresD.It is required

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