Question

AT shcool,it is essential that every child--equally regardless of family background

AtreatingBtreatedCbe treated Dis treated

Answer 1

C： be treated 是正确答案。
在 it is+ necessary/important/essential 等形容词+that 从句的情况下，that 从句中的谓语部分要求用虚拟语气，即should+原形动词，should 常可省略。具体到这个that 从句，由于every child和treat之间是被动关系，需要用被动语态，也就是should be treated。由于省略了should, 就只能选C “be treated”。