It was along the Mississippi River_____(that/where)Mark Twain spent much of his childhood.

题目

It was along the Mississippi River_____(that/where)Mark Twain spent much of his childhood.
选填并分析句子成分告诉我为什么

答案

选that ,强调句型
正常的语序是：
Mark Twain spent much of his childhood along the Mississippi River.
马克吐温 大部分童年时光 都是在密西西比河沿岸度过的
主语 谓语宾语 状语
现在为了强调状语,即密西西比河沿岸,将状语提前,强调句型格式是：
it is/was +强调部分 that 句子其他部分