有这样一道题：
It was in the small house _________ was built with stones by his father _________ he spent his childhood.
A. which, that B. that, which C. which, which D. that, where
答案选A，填对此句的关键是要弄清第二空必须填 that，因为这是一个强调句，被强调部分为 in the small house (以及修饰它的定语从句 which was built with stones by his father)。又如：
(1) It was the boy _________ had been in prison _________ stole the money.
A. who, where B. that, how C. who, that D. that, which
【分析】此题答案选C，全句为强调句，被强调成分是 the boy (以及修饰它的定语从句who had been in prison)。
(2) It was just in the room _________ he was born _________ he died.
A. where, which B. that, that C. where, that D. which, that
【分析】此题答案选C，全句为强调句，被强调成分是 in this room，where he was born 为修饰 the room 的定语从句。