本题应该选择 C where ;that
分为三步去理
一、句子分析:
1. 主句——was it in the school that the accident happened?
2. 定语从句——where your father works
二、主句结构:
1. 改回到肯定句——it was in the school that the accident happened.
显然这是一个用在“It was + 被强调的 in the school + 关联词 that + 其它部分”的强调句,意思是,事故正是发生在这所学校.
2. 如果不强调就是——the accident happened in the school.
二、定语从句:
1. 关系副词 where 指代地点状语 in the school;
2. 改为简单句—— your father works in the school.