【题目】It was ______ we were returning home ______ I realized what a good feeling it was to have helped someone in trouble.
A. when; before B. when; that
C. before; where D. how; that
在线课程【答案】B
【解析】考查定语从句。句意：当我们回到家的时候，我意识到帮助陷入困境的人是一种多么好的感觉。这是一个强调when引导的时间状语从句的强调句型。根据句意可知答案为B。