Was it in front of the office()the traffic accident happened

题目

Was it in front of the office()the traffic accident happened
where
which
that
in which
我选了where 为什么是that呢

答案

Was it in front of the office(that)the traffic accident happened?
这起交通事故的地点是在办公室前面吗?
这是一个强调句型.从句部分要用that来当引导词.
它的结构为：It's + 强调部分+ that 从句.